Very informative for beginners. I also went down the same path, getting each particular item one piece at a time. I slowly acquired first class stuff by staying on Ebay until a deal came up. Some of my equipment, I had to rebuild, but there again is another fun learning path. Good luck to the young people and hobbyist. Just keep trying. You will succeed. A very helpful and inspirational video. thanks
Satellite_Guy Yes, I think we all went down this way and it is a good way to learn along. Hope it is inspiring enough that many young people take the courage to start. Thanks for your comment 73 Peter
+TRXBench I have been studying German for a couple years and I listen often to it's speakers, trying to learn the language. Your accent, I find very pleasant and your videos very informative. I wish I could speak German as well as you speak English. Again, great job.
great video ! just the other day I was reading a book with a good idea for a dummy load. Soldering several flashlight bulbs together, enough so they would barely illuminate with key-up power then go full bright with voice, the steady illumination would help to test modulation. Just thought I would share that. Its an affordable alternative.
Awesome beginning starter set up ...a good RF average and peak meter and good bench ohm meter and vtag meter and LCR meter good starter stuff ..also frequency counter and monitor
That SWR meter brings back memories. My dad and I built that exact meter from a kit purchased from a local electronics store during the original CB radio fad.
Years ago (back in the mid 70's) I used to modify SSB CB radios to go above 40 channels. I would charge $20.00 per radio. When we moved from Georgia to Tennessee, I ended up selling all my test equipment including my linear amps and filters. I used a Fluke frequency counter, several power supplies (linear of course), a digital multi-meter and a single channel oscilloscope and a curve tracer for the oscilloscope. I was in the process of updating some of my equipment when we moved and I sold everything including my J. C. Penny's 6241 SSB CB radio that was highly modified. I reprogrammed the PLL chip to go above channel 40 and below channel 1. Had a tuning wand sticking out of the top just over the frequency oscillator so I could swing the oscillator up for above 40 and swing it down for channels below 1. Cheers. W Rusty Lane K9POW in eastern Tennessee
A while back Dr. Carlson's Lab, recommended you as a good channel to watch.... I have been watching ....... I see that that the caps are polarized... Are the electrolytic caps ??? There are some mica caps also that are polarized.... Also what value and wattage is that resistor at the meter ???
Peter, don't forget the modulation meter and the 1/4 Watt neon bulb RF sniffer. The best CB service monitor I had was left over from my Motorola two way radio service station, a Lampkin 105-B. Nobody remembers them anymore. K4OF.
BOB RENFRO Hi Bob, of course you are right, there are many additional devices which makes sense but this is only to start off. Sure you need to buy more and more step by step...
Hi Peter i have tried it with a 1khz signal generator and it works fine with the load resistor fitted, plenty of volume full full scale deflection thanks...Fred.
Really helpful video, would like to see a follow up repair or tune video using the new test bench. A question about old valve type signal generators, are they all roughly the same basic design and opperation principle? i have an old sphere unit but it doesn't seem to full function correctly and it would be nice to see it run again..
Crusader 26CT1508 Hi Sean, thanks for your feed back. Many of my videos are already addressing how to use those test equipment even it is professional stuff it is always the same procedure. Valve signal generators work in deed basically the same way but there are differences in schematic. You need a basic understanding on electronics to fix those devices..
Hi Jan or Peter...good video for beginners, are you going to do a follow up for adjusting deviation and setting the adjusters inside the radio? squelch, etc..i have used an hf radio or a second cb on low power before as a signal generator on a dummy load....think you can maybe use an analouge meter on low AC for reciever voltage across speaker...from Fred g4vvq in England.
Just came across your video. AWESOME!! Really enjoyed it. Quick question about your output meter. Whats voltage for cap1 and 2?? Also can the 8 ohm load resistor be installed in the meter or does it have to be outside like you have it? Thanks
Hi Peter iv been a Ham for many years now, and came across your channel its brilliant and I have learnt so much from your radio repairs, can I just ask, I have recently built your suggested output meter as I do like to try align radios, the meter works well and if I increase the audio I can set the meter to say 1/2 full scale but what I’m finding is that when I trim the rf or if transformers the movement on the meter is so tiny you can’t hardly see it move 👀.Is there any way to increase the meter sensitivity?..
Thanks for the great video for newbies. Can you please let me know why you used ( for antenna dummy load) 8 pcs of 470 Ohm resistors instead of ONE 50 Ohm resistor? Is that PL 259 connector used for that antenna dummy load?
These little resistors are typically rated at 1/3w. So ten resistors could handle 3w. 100 resistors would handle 30w etc... Put 2w through a single 1/3w resistor - it would turn black, melt and go 'pop'! Hope that helps, G7LAS
+TRXBench hello im looking to by a rci 2950 with at least 60 watts & with a open cliafire ''''can you help a lot of stores don't want to do it can you call tonight or not phn,is 1319 8245158 grundy center io with a knew one,,,p ,,cd cash ok with money order....
I ordered a micro amp meter and they sent me a mili amp meter by mistake , it was too late to ask for a exchange 5 months later when I finally opened the package .... Are the coils inside the meters the same ? I was thinking the circuit it's connected to is what determines the actual swing of the needle .... Can I use the meter I have??
Thanks for this video. Now I can setup my mad scientist lab .... After watching this, I realized that I had everything except the output meter and the RF generator. The output meter is in the planning stages and the RF generator is on the way from "the" Bay. There's also a Frequency counter on the way from China. I'll be up and running soon! Can you describe how the connections between the radio/generator/wattmeter? Are both connected to the antenna connector through a BNC T connector, or do you disconnect/connect the devices based on which circuit you are testing?
No never use a T connector at the RF connector of the radio John. Not only that you produce a mismatch to your swr but you will toast your generator if you transmit into it. You always have to connect and disconnect for TX or RX path. Hope that helps 73
Thanks for the reply. After posting my question, I watched the video a second time and noticed that you were disconnecting/connecting the proper device. Now I wait for my RF generator.
Hi Asle, yes that is the load resistor. As the audio amp is working into 8 Ohm you use a load resistor of 4-8ohm. The resistor should be able to handle 5-10 watt power. 73
+MonkeyMagic Elecifun Hi, thanks for feed-back! Well the diodes are not very special, you can use OA47 or AA119 or any other Germanium type.You only want to get the signal rectified so there is no special demand for the diodes. 73
I have an MFJ-264 dummy load, but it only has an input and no output. Is there a way I can attenuate the signal so I can apply it to my scope without damaging anything?
@@TRXLab Thanks so much Peter! Very kind of you to have taken the time to answer. I have a Tektronix P6139A 500MHz Voltage probe so hopefully this will do. It would still be useful to have an output the the dummy load.
great vid I was wondering I'm putting together the dummy load I bought a 10 pack of metal oxide 470 ohm at 2 watt each is this ok I live in usa are cbs are 4 watt max as well
Well, I see this video is more than 2 years old. However, it still applies for many people. I have watched several of your videos that deal with no tx and no rx. In those vdeos you are always displaying and referencing a schematic diagram. My question is: where do you obtain these schematics? More importantly, where can a person on a budget obtain these diagrams? Do they come with the radio or do you subcribe to a monthly service (like SAMS photofacts)?
Interesting. After searching, I see that some schematics are available and some are not. I thought that you were going to tell me that schematics are included with the purchase of a new radio (or a professional subscription). You have a fantastic channel. You make everything look easy. From personal observation, I know this is the sign of you being a truly knowledgeable craftsman. I extend my admiration and gratitude. Everyone who teaches in this venue is commendable. You reach across nations, beyond borders and across oceans. You create a sense of unity that we can all appreciate and participate in. Thank you.
Hi Peter on the audio meter you appear to have what looks like a white resistor across the meter terminals, but its not on the schimatic, what is it? the meter you use for peaking the IF transformer, Fred
Hallo Bernd, diese alten Generatoren brauchen in der Regel eine volle Restauratiom, somit wäre ein HP oder ähnlich die bessere Wahl. Im Video war das nur als Beispiel gedacht, aber keine Empfehlung sich genau nach diesen Generator umzusehen..Das nur als ergänzende Information. 73
Hallo Peter, danke für die Info, laut den Bildern hat der Verkäufer das Gerät an einem Oszilloskop getestet. "Von 100KHz bis300MHz. Der Generator kann intern moduliert werden 400Hz oder oder fremdmoduliert." Ich lass mich mal überraschen.
The resistor of 8Ohm represents the speaker load to the audio amp as you don't want to listen all the time to a annoying ton while you are aligning a radio...
Hi Peter i have made one of those Audio Meters as your diagram, i plugged it onto a radio speaker socket, it muted the speaker but i thought i should get a reading on the meter when tuned to a station and volume turned up, the needle doesnt move at all, i am using 100 micro amp meter and 47k ohm resistor etc as you diagram...does it only work with a high constant tone?...or have i got it wrong..as far as i can see i have made it same as you schimatic....Fred in UK
Tom Smith Hi Fred, the meter has to be connected in parallel either to the speaker or a dummy resistor instead. it is mad for audio frequency up to 3kHz or so. It will directly read the audio output of a radio. If it is muting the tone it will most probably short it out to ground. Please check again you circuit espacily your diodes. Are they in the right direction?? The circuit I use is exactly what you see on the schema. double check very carefully once again. good luck 73 Peter
TRXBench Hi Peter, its ok if i take the load resistor off and plug it into a rado the needle hand does move ok, i guess there i not enough sound coming from radio to work it, with load resistor disconnected the volume on radio about half way up looks good, but i will try it later with a 1khz signal generator with the resistor connected, sure it will be ok, yes i have double checked the circuit it is all together right, thanks again from Fred.
+bigpimp347 Counters are cheap, especially second hand but a two channel oscilloscope and accurate generator can get you out of trouble. One you get close you can feed each and trigger on the generator and adjust the rig to slow the second trace movement, or just use the scope.
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Many thanks for taking the time to show people how to set up on a budget, not many would take the time to do this. Its a great video yet again.
26-PS-001 Hi there, thanks for your nice comment! 73
Very informative for beginners. I also went down the same path, getting each particular item one piece at a time. I slowly acquired first class stuff by staying on Ebay until a deal came up. Some of my equipment, I had to rebuild, but there again is another fun learning path. Good luck to the young people and hobbyist. Just keep trying. You will succeed. A very helpful and inspirational video. thanks
Satellite_Guy Yes, I think we all went down this way and it is a good way to learn along. Hope it is inspiring enough that many young people take the courage to start. Thanks for your comment 73 Peter
Thank you, very informative and interesting.
GREAT job.
I wish I seen this video last year when I was trying to learn about transceiver service.
Grant Fullen Hi Grant, well you was one year to early, LOL:-). Thanks for feed-back!
Very good job and very informative. I wish my German was as good as your English. You speak it very well.
+bain5872 Hi, thanks for the kind words. Hope my accent is not too bad...all the best
+TRXBench I have been studying German for a couple years and I listen often to it's speakers, trying to learn the language. Your accent, I find very pleasant and your videos very informative. I wish I could speak German as well as you speak English. Again, great job.
Great video, i am just starting to get into electronics repairs, so i look forward to watching more of your videos!
Hi Aron, very good have fun with clectronics. 73
So i wan to get to learn to fix two way radios and the systems heat would be some steps to get to my goal thanks for any info
Once again, thank you my friend! I'm looking forward to more.
Jimz Custom Radios Hi Jim, thanks for taking the time to watch my videos! 73
What a great guide...i will be getting those bits of kit for my CB workshop to help keep my 80's radios on the air...Thankyou
What a great microphone by the way
charlieoscar09 Hope you can maintain your 80's radios! Yes the Turner +3 is a nead mic... 73
You did a great video for beginners
***** Thanks Dennis!
Just looking through some of your videos Peter. Very nice. I specially liked the output meter. So much I just built one for the heck of it :)
+The Radio Shop Hi Buddy, just a beginner video, but the little output meter is really wicked. Good luck for the project! Thanks for stopping by. 73's
great video ! just the other day I was reading a book with a good idea for a dummy load. Soldering several flashlight bulbs together, enough so they would barely illuminate with key-up power then go full bright with voice, the steady illumination would help to test modulation. Just thought I would share that. Its an affordable alternative.
+Dan Cross Hi Dan, yes very interesting info for the community. If once started you always try to improve and extend your equipment.. 73
Another great video Peter! 2 thumbs up, but only one will show :-)
Mr Carlson's Lab Hi Paul, thanks a lot! looking forward to watch your new one. Have not had the time yet :-(
Awesome beginning starter set up ...a good RF average and peak meter and good bench ohm meter and vtag meter and LCR meter good starter stuff ..also frequency counter and monitor
I've been looking for something to peak the RX stages with, your little meter looks great! I will probably build one.
+TheMidnightrdr Hi, yes for easy peaking this little Output meter is perfect. Good luck with the project and thanks for fed-back! 73
you make your videos very interesting,even i paid attention,good luck in the future....
Thanks for watching 73
That SWR meter brings back memories. My dad and I built that exact meter from a kit purchased from a local electronics store during the original CB radio fad.
Galfonz Hi, thanks for your comment. Yeah sometimes it is really nice to see something that brings back memories! All the best...
I purchased an IFR for cb repairs which repaid for itself in speedy repair and alignment of HF and UHF cb's
Years ago (back in the mid 70's) I used to modify SSB CB radios to go above 40 channels. I would charge $20.00 per radio. When we moved from Georgia to Tennessee, I ended up selling all my test equipment including my linear amps and filters. I used a Fluke frequency counter, several power supplies (linear of course), a digital multi-meter and a single channel oscilloscope and a curve tracer for the oscilloscope. I was in the process of updating some of my equipment when we moved and I sold everything including my J. C. Penny's 6241 SSB CB radio that was highly modified. I reprogrammed the PLL chip to go above channel 40 and below channel 1. Had a tuning wand sticking out of the top just over the frequency oscillator so I could swing the oscillator up for above 40 and swing it down for channels below 1. Cheers. W Rusty Lane K9POW in eastern Tennessee
interesting to hear
THANK YOU VERY MUCH FOR SHOWING US, WHAT IS NEEDED TO START PRACTICING ON RADIO S , TO REAPAIR AND ALINE,THE BASIC STARTING POINT?...
always enjoyable thankyou,, from vk3
Nice video, Peter. Got your feed from Mr. Carlson's Lab. Greg
+Gregory West Hi Greg thanks for stopping by and thanks to my friend Paul!
Great video, as usual! Vielen dank, Peter!
Thanks for watching 73
Nice video i'm always looking forward to new video's. keep up the food work 👍
+Oscar Holterhues Thank you Oscar! 73
Great video. Thanks for sharing.
sneakysnake109 Thanks for watching and feed-back!
A while back Dr. Carlson's Lab, recommended you as a good channel to watch.... I have been watching .......
I see that that the caps are polarized... Are the electrolytic caps ??? There are some mica caps also that are polarized.... Also what value and wattage is that resistor at the meter ???
Peter, don't forget the modulation meter and the 1/4 Watt neon bulb RF sniffer. The best CB service monitor I had was left over from my Motorola two way radio service station, a Lampkin 105-B. Nobody remembers them anymore.
K4OF.
BOB RENFRO Hi Bob, of course you are right, there are many additional devices which makes sense but this is only to start off. Sure you need to buy more and more step by step...
Hi Peter i have tried it with a 1khz signal generator and it works fine with the load resistor fitted, plenty of volume full full scale deflection thanks...Fred.
Tom Smith That's great! enjoy the meter... 73 from Peter
Thank you
Really helpful video, would like to see a follow up repair or tune video using the new test bench. A question about old valve type signal generators, are they all roughly the same basic design and opperation principle? i have an old sphere unit but it doesn't seem to full function correctly and it would be nice to see it run again..
Crusader 26CT1508 Hi Sean, thanks for your feed back. Many of my videos are already addressing how to use those test equipment even it is professional stuff it is always the same procedure. Valve signal generators work in deed basically the same way but there are differences in schematic. You need a basic understanding on electronics to fix those devices..
Thanks great video and advice! I'm a new subscriber : )
+Sam Iam Hi Sam, thanks for watching and for subscribing 73
Hi Jan or Peter...good video for beginners, are you going to do a follow up for adjusting deviation and setting the adjusters inside the radio? squelch, etc..i have used an hf radio or a second cb on low power before as a signal generator on a dummy load....think you can maybe use an analouge meter on low AC for reciever voltage across speaker...from Fred g4vvq in England.
Tom Smith Hi Fred, well using a "normal" AMM for AC is critical as those meters very often does not go really ahead 50HZ.
Thanks for feed back Peter
Wonderful
I think i have seen a video of you using that RX meter... Can you pin a link to a couple of those links so your viewers can see them...??
Just came across your video. AWESOME!! Really enjoyed it. Quick question about your output meter. Whats voltage for cap1 and 2?? Also can the 8 ohm load resistor be installed in the meter or does it have to be outside like you have it? Thanks
Hi Peter iv been a Ham for many years now, and came across your channel its brilliant and I have learnt so much from your radio repairs, can I just ask, I have recently built your suggested output meter as I do like to try align radios, the meter works well and if I increase the audio I can set the meter to say 1/2 full scale but what I’m finding is that when I trim the rf or if transformers the movement on the meter is so tiny you can’t hardly see it move 👀.Is there any way to increase the meter sensitivity?..
Are you sure that the meter you are using is in uA for maximum sensitivity?
oh dieses netzteil hab ich auch noch aus den 90s
lol ja die waren weit verbreitet..Danke fürs vorbeischauen..
Your very welcome.
Thanks for the great video for newbies. Can you please let me know why you used ( for antenna dummy load) 8 pcs of 470 Ohm resistors instead of ONE 50 Ohm resistor?
Is that PL 259 connector used for that antenna dummy load?
These little resistors are typically rated at 1/3w. So ten resistors could handle 3w. 100 resistors would handle 30w etc...
Put 2w through a single 1/3w resistor - it would turn black, melt and go 'pop'!
Hope that helps, G7LAS
Tnx for sharing one more time.
73 DE PU2SRZ
Silvio Pinheiro Hey Silvio, glad to see you here! Thanks for comment 73 Peter
+TRXBench hello im looking to by a rci 2950 with at least 60 watts & with a open cliafire
''''can you help a lot of stores don't want to do it can you call tonight or not phn,is 1319 8245158 grundy center io with a knew one,,,p ,,cd cash ok with money order....
I ordered a micro amp meter and they sent me a mili amp meter by mistake , it was too late to ask for a exchange 5 months later when I finally opened the package .... Are the coils inside the meters the same ? I was thinking the circuit it's connected to is what determines the actual swing of the needle .... Can I use the meter I have??
yes there is normally a shunt resistor which needs to take away
Thanks for this video. Now I can setup my mad scientist lab ....
After watching this, I realized that I had everything except the output meter and the RF generator. The output meter is in the planning stages and the RF generator is on the way from "the" Bay. There's also a Frequency counter on the way from China. I'll be up and running soon!
Can you describe how the connections between the radio/generator/wattmeter? Are both connected to the antenna connector through a BNC T connector, or do you disconnect/connect the devices based on which circuit you are testing?
No never use a T connector at the RF connector of the radio John. Not only that you produce a mismatch to your swr but you will toast your generator if you transmit into it. You always have to connect and disconnect for TX or RX path. Hope that helps 73
Thanks for the reply. After posting my question, I watched the video a second time and noticed that you were disconnecting/connecting the proper device. Now I wait for my RF generator.
where can I find the HGL-5050E multimeter that you are using? thanks and 73's
what is a good signal generator for this work off maybe ebay
Great video. I am going to build an outputmeter like this, but can you tell me - what is the white component you have in the alligator clamps? 73 Asle
Hi Asle, yes that is the load resistor. As the audio amp is working into 8 Ohm you use a load resistor of 4-8ohm. The resistor should be able to handle 5-10 watt power. 73
Ok, but do you know a cheap product too, for alignement cb radio because this can't i think generate a signal 1khz ?
Ty
spitze, big dankeschoen. der wiederstand ueber den eingang von dem selbstbau meter, was ist der wert von diesem bitte?
8 Ohm
@@TRXLab danke, can auch 4 Ohm sein wenn es zutrifft ja?
@@TRXLabI am looking in my shack for all the parts to build this now, can I use any type of diodes or do they have to be the AA119?
Hello, I really enjoy your video's. Could I ask, What are the germanium diodes you use in your output meter please. Many thanks in advance.
+MonkeyMagic Elecifun Hi, thanks for feed-back! Well the diodes are not very special, you can use OA47 or AA119 or any other Germanium type.You only want to get the signal rectified so there is no special demand for the diodes. 73
TRXBench Hello, I have ordered some OA47's so I can make a crystal radio set. I got 10 so I will use two for your Output Meter project. Thank you
+MonkeyMagic Elecifun Good luck with your project!!
How can I test and or calibrate the output meter.
I have an MFJ-264 dummy load, but it only has an input and no output. Is there a way I can attenuate the signal so I can apply it to my scope without damaging anything?
the 1:10 probe can handle already a lot of voltage.
@@TRXLab Thanks so much Peter! Very kind of you to have taken the time to answer. I have a Tektronix P6139A 500MHz Voltage probe so hopefully this will do. It would still be useful to have an output the the dummy load.
great vid I was wondering I'm putting together the dummy load I bought a 10 pack of metal oxide 470 ohm at 2 watt each is this ok I live in usa are cbs are 4 watt max as well
Yes metal oxide is the right material you can give it a go Mike...73
Well, I see this video is more than 2 years old. However, it still applies for many people. I have watched several of your videos that deal with no tx and no rx. In those vdeos you are always displaying and referencing a schematic diagram. My question is: where do you obtain these schematics? More importantly, where can a person on a budget obtain these diagrams?
Do they come with the radio or do you subcribe to a monthly service (like SAMS photofacts)?
Hi, they answer is really simple----All service manuals I have are to obtain free on the web. Just search via google. Thanks for watching my videos 73
Interesting. After searching, I see that some schematics are available and some are not. I thought that you were going to tell me that schematics are included with the purchase of a new radio (or a professional subscription).
You have a fantastic channel. You make everything look easy. From personal observation, I know this is the sign of you being a truly knowledgeable craftsman. I extend my admiration and gratitude. Everyone who teaches in this venue is commendable.
You reach across nations, beyond borders and across oceans. You create a sense of unity that we can all appreciate and participate in. Thank you.
Thank you for the kind words! Glad that you like my work! All the best Cheers
With this equipment, how would a new tech be able to check positive and negative modulation % without a scope?
Hi Chris, this is to start off, you can't have anything right from the beginning if you don't have a big wallet... 73
I have a B&K COBRA CITIZENS BAND TRANSCEIVER TESTER I just pick up do you know anything about them it did not come with a manual Thank you sir 73's
+Simple Reviews 7 As long it is useful for you it is perfect.. Thanks for watching 73
Hi Peter on the audio meter you appear to have what looks like a white resistor across the meter terminals, but its not on the schimatic, what is it? the meter you use for peaking the IF transformer, Fred
Tom Smith Hi Fred, that is a 8 Ohm dummy resistor instead of speaker . 73
TRXBench Ok Peter, i thought that was what it was but wasnt sure,,thanks fom Fred
auf ebay beobachte ich gerade genau den HF-Prüfgenerator
Hallo Bernd, diese alten Generatoren brauchen in der Regel eine volle Restauratiom, somit wäre ein HP oder ähnlich die bessere Wahl. Im Video war das nur als Beispiel gedacht, aber keine Empfehlung sich genau nach diesen Generator umzusehen..Das nur als ergänzende Information. 73
Hallo Peter, danke für die Info, laut den Bildern hat der Verkäufer das Gerät an einem Oszilloskop getestet.
"Von 100KHz bis300MHz. Der Generator kann intern moduliert werden 400Hz oder oder fremdmoduliert."
Ich lass mich mal überraschen.
Hi peter, Really interested in building the output meter, What is the purpose of the resistor clamped to the input terminals ?
The resistor of 8Ohm represents the speaker load to the audio amp as you don't want to listen all the time to a annoying ton while you are aligning a radio...
@@TRXLab Ok. Like a dummy speaker, I suppose any germanium diodes would work in the circuit ?
you are right in both points 73
@@TRXLab Cheers peter 73
Hi I have a faulty president madison is this something you could consider looking at?
Paul Bailey Paul, it is not possible to say anything with not knowing the problem.
Hi Peter i have made one of those Audio Meters as your diagram, i plugged it onto a radio speaker socket, it muted the speaker but i thought i should get a reading on the meter when tuned to a station and volume turned up, the needle doesnt move at all, i am using 100 micro amp meter and 47k ohm resistor etc as you diagram...does it only work with a high constant tone?...or have i got it wrong..as far as i can see i have made it same as you schimatic....Fred in UK
Tom Smith Hi Fred, the meter has to be connected in parallel either to the speaker or a dummy resistor instead. it is mad for audio frequency up to 3kHz or so. It will directly read the audio output of a radio. If it is muting the tone it will most probably short it out to ground. Please check again you circuit espacily your diodes. Are they in the right direction?? The circuit I use is exactly what you see on the schema. double check very carefully once again. good luck 73 Peter
TRXBench Hi Peter, its ok if i take the load resistor off and plug it into a rado the needle hand does move ok, i guess there i not enough sound coming from radio to work it, with load resistor disconnected the volume on radio about half way up looks good, but i will try it later with a 1khz signal generator with the resistor connected, sure it will be ok, yes i have double checked the circuit it is all together right, thanks again from Fred.
Hi Peter, what is the number for the germaniam diodes, hard to read your numbers.
AA 119
@@TRXLab great video, thanks
👍👍👍👍👍👍
hi, i can replave the 100ua meter panel by a 100mv meter ?
thanks.
Yes but you need to adapt your components around the meter....
What is the wattage of the resistor connected on the front of the output meter?
I is a 11 watt resistor William.
Is this the 47K resistor shown in the schematic?
Probably an 8 ohm to replace the external speaker resistance.
Froeliche Veinauchstens Peter
Merry Christmas OJ
Dunca
I wish you would repair your "longwindedness"
I'm already working on that as well.
Didn't mean to be rude, but I just wanted to let you know :). I appreciate your work.
no frequency counter..??
+bigpimp347 well you have to start somewhere..., but you are right finally you need a counter at a point.
+bigpimp347 Counters are cheap, especially second hand but a two channel oscilloscope and accurate generator can get you out of trouble. One you get close you can feed each and trigger on the generator and adjust the rig to slow the second trace movement, or just use the scope.