Todd Anonymous
Todd Anonymous
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Yaesu FT 901DM repair
This video details initial repair of a dead Yaesu FT-901 DM Ham Radio transceiver.
Переглядів: 1 966

Відео

Yaesu FTR-5410 Update
Переглядів 6564 місяці тому
This video is an update to the Yaesu FTR-5410 repeater conversion.
Repeater Oscillator Conversion
Переглядів 1614 місяці тому
This video details modifying a Yaesu FTR-5410 from crystal control , to synthesized operation. Using an Arduino nano and an Si 5351clock module , this allows the repeater frequencies to be changed via software control.
Tektronix 515A
Переглядів 2925 місяців тому
This video describes troubleshooting procedures of a non functional Tektronix 515A oscilloscope . It had out of spec power rails and defective high tension output. Many older tubular capacitors had excessive leakage and were replaced. Four vacuum tubes in the power supply were replaced as well as the three HV rectifier tubes. I was unable to get the high tension voltages within spec. I plan on ...
Allied AX 190 receiver alignment
Переглядів 1295 місяців тому
This video goes over the alignment of an Allied AX-190 ham band receiver.
Allied AX 190 Ham Receiver
Переглядів 6095 місяців тому
This video describes the troubleshooting and repair of an ( Almost dead ) Allied AX-190 Amateur Radio receiver. If you get one of these radios , inspect solder joints as many were found defective on this unit. Correction : At 21:52 in the video during the circuit description I stated that L4, L5, and L6 were switched in to lower the tuned frequency. This is incorrect. Adding the increased induc...
Alinco DR 610
Переглядів 2656 місяців тому
This video details troubleshooting a dead Alinco DR-610 dual band VHF / UHF transceiver. The unit has numerous problems , some of which are detailed in the video. At this point I was unable to get the unit operational. Upon obtaining parts, and if I am successful, there may be a part 2.
Lithium cell harvesting options
Переглядів 3556 місяців тому
This video describes the harvesting and testing of lithium cells from discarded laptop batteries. They can be used to build battery packs to power experiments and projects.
Sinadder 3
Переглядів 2046 місяців тому
This video details the removal of modifications, and testing, of a Sinadder 3 SINAD meter from Helper Instruments Company
Electronic Development Corporation Model 521
Переглядів 3226 місяців тому
This video details the troubleshooting and repair of an EDC (Electronics Development Corporation) DC calibrator. This instrument is used to calibrate DC voltage and DC ammeters .
ESR Meter build
Переглядів 11 тис.6 місяців тому
This video describes an easy to build ESR meter and compares it to more modern digital devices. It is based on a construction article from a 2001 electronics magazine.
Systron Donner DL40 1A Power Supply
Переглядів 4706 місяців тому
This video describes the testing and maintenance of a Systron Donner DL40-1A Dual Power Supply
Hp 412A VTVM Troubleshoot and Mod
Переглядів 2886 місяців тому
This video describes the troubleshooting and mod of a Hewlett Packard 412A VTVM. The unit is modified to use LED's in place of incandescent lamps to drive the chopper amplifier.
Systron Donner 6020 Frequency Counter repair
Переглядів 2706 місяців тому
This video shows the repair of a Systron Donner 6020 microwave frequency counter. It measures from 10 hz to 20 Ghz . Note two corrections : At 12:33 , band 2 measures from 100 - 512 Mhz. At 13:16, it is a type N connector , not a UHF type.
Testing Semiconductor Devices
Переглядів 3827 місяців тому
This video examines several devices for testing semiconductors. Most electronics hobbyists collect large numbers of devices by harvesting salvaged equipment . They need to be tested before being put to use. DMM's, Component Testers, Transistor analyzers, and Curve Tracers are demonstrated.
Toshiba SD V290 DVD VHS player
Переглядів 1397 місяців тому
Toshiba SD V290 DVD VHS player
Sony CDP C245 CD Player
Переглядів 2567 місяців тому
Sony CDP C245 CD Player
Hewlett Packard 3586C Part 2
Переглядів 2527 місяців тому
Hewlett Packard 3586C Part 2
Hewlett Packard 3586C Selective Level Meter
Переглядів 4197 місяців тому
Hewlett Packard 3586C Selective Level Meter
rf interference from a switch mode battery charger
Переглядів 1257 місяців тому
rf interference from a switch mode battery charger
iMac Display Panel
Переглядів 217 місяців тому
iMac Display Panel
Precision Voltage Standard
Переглядів 5597 місяців тому
Precision Voltage Standard
Heathkit IM 5238 AC Voltmeter
Переглядів 5178 місяців тому
Heathkit IM 5238 AC Voltmeter
Tektronix 485 troubleshoot and repair
Переглядів 8268 місяців тому
Tektronix 485 troubleshoot and repair
Onkyo DR 90 DVD Receiver
Переглядів 2618 місяців тому
Onkyo DR 90 DVD Receiver
Pioneer VSX 917V Repair
Переглядів 2,3 тис.8 місяців тому
Pioneer VSX 917V Repair
Singer FM 10C Heterodyne Generator Monitor
Переглядів 1,2 тис.8 місяців тому
Singer FM 10C Heterodyne Generator Monitor
AED Teardown
Переглядів 2,9 тис.8 місяців тому
AED Teardown
Bell and Howell voltmeter
Переглядів 2578 місяців тому
Bell and Howell voltmeter
Hp 211B
Переглядів 5428 місяців тому
Hp 211B

КОМЕНТАРІ

  • @toohype5425
    @toohype5425 12 днів тому

    Hi Todd. I have a TS-830s that needs to be worked on. I was hoping if you can work on mine. Thanks!

  • @howardiko7156
    @howardiko7156 13 днів тому

    This is so cool. You are the man. Acetone does cut the varnish when heated. Just a thought.

  • @danaknight7678
    @danaknight7678 20 днів тому

    What was final solution after adding semiconductor diodes ?

    • @toddanonymous5295
      @toddanonymous5295 20 днів тому

      Hi Dana, I have the diodes. Unfortunately I have been diagnosed with cancer , and have not been able to do much the last few months. I am recovering slowly , and hope to resume my projects soon. I will do an update on the 515a as soon as I am able . Thanks for asking.

    • @danaknight7678
      @danaknight7678 20 днів тому

      @@toddanonymous5295 Take good care of yourself first and foremost. Its my humble belief we are in the exponential solution growth phase of Cancer solutions, weeks and months and AI making huge progress in genetic alteration war against Cancer.

  • @theheathkitshop2424
    @theheathkitshop2424 23 дні тому

    Hi.... I have a 901DM on my bench and the clarifier does not work. I can't hear the relay open/close when I push the RIT button in. TX clarifier does work. Question! How in the hell do you get to the 1920 switch board? Do I have to take the entire front panel off?

  • @marklauren15
    @marklauren15 23 дні тому

    Hi Todd, can I get the model number of the AM/FM Tuner box?

  • @lylewatts6370
    @lylewatts6370 26 днів тому

    Yes great stuff and so small Thanks for sharing It gives me an idea that things can be fixed with time and patience.

  • @josealeixes2861
    @josealeixes2861 Місяць тому

    Congratulations God bless you greatly I hope you are better soon hugs

  • @josealeixes2861
    @josealeixes2861 Місяць тому

    todd good morning! where are you ? great video ...

    • @toddanonymous5295
      @toddanonymous5295 Місяць тому

      Hi Josealeixes2861, I have been very sick the last few months but am slowly recovering now. I have a number of projects I'm anxious to work on and plan on beginning soon. Thanks for asking.

  • @Team-fabulous
    @Team-fabulous Місяць тому

    Excellent video. Love the old boat anchors.....

  • @thorstenrock8708
    @thorstenrock8708 Місяць тому

    ia800308.us.archive.org/21/items/manualsplus_04263/manualsplus_04263.pdf

  • @alzalame
    @alzalame Місяць тому

    Nice and neat , thank you very much .

  • @mikefinn2101
    @mikefinn2101 Місяць тому

    Great video a great learning experience for those who don't own this radio. Enjoyed it very much appreciate your doing this video very kind of you 73s Mike

  • @moviestudioland
    @moviestudioland Місяць тому

    You are THE 7603 MASTER

  • @albertocasas6420
    @albertocasas6420 2 місяці тому

    I am interested in building one and was wondering if you could provide me with a parts and source list. I would greatly appreciated it very much.

  • @BIPOLARPEOPLE
    @BIPOLARPEOPLE 2 місяці тому

    hello i just got rid of mine,very scratchy and noisey.i wished they did all the old stough again best ever made

  • @y_x2
    @y_x2 2 місяці тому

    These set have usually a lot more than a problem... piece of junk now.

  • @acestudioscouk-Ace-G0ACE
    @acestudioscouk-Ace-G0ACE 2 місяці тому

    Thanks very much for this series. Very interesting and well explained. I've just bought a TS830 and also have a TS530, so of particular interest to me.

  • @petertyrrell6690
    @petertyrrell6690 2 місяці тому

    Yup, you need to adjust the pre-selecter to the band you want, you'll get no audio out until you do this. This caught me. I just got one of these, and re-capped it. 73

  • @KeithVK6VP
    @KeithVK6VP 2 місяці тому

    Great video, lots of good info, especially the VFO servicing. My 901DM is 46 years old now, June '78 build and the VFO is getting a bit lumpy. Also got issues tuning up on 40. Loading control won't peak. Just keeps rising all the way to position 10 on the scale. l hope yours is now working 100%. Thanks for posting. 73 de Keith

  • @AndreBrosda
    @AndreBrosda 2 місяці тому

    I bought one FT 910D back in January. Seems the Attenuator Switch is pretty much broken. If it is half depressed I have a good reception, in any other position I have nearly no reception. And the S-Meter doesn't display how much output I have. I will trace all the cables and see if I can get the 901 back to service. On the good side: VFO is stable and not drifting, dial is smooth output is around 80Watts, but without a proper readout I won't try more. Any tipps are higly appreciated.

    • @toddanonymous5295
      @toddanonymous5295 2 місяці тому

      Hi Andre, Incoming RF is routed through the Tune Switch board ( PB 1720) before being sent to the RF board ( PB 1702 ). Switch S03 on the Tune Switch board is the attenuator switch that switches in R05,06, and 07 to attenuate the received signal. I would clean the contacts of S03 as it is likely the cause of your intermittent. It is a good idea to clean all relay and switch contacts as these are the major areas that cause trouble in these older rigs. Good luck

  • @brianveitenheimer4492
    @brianveitenheimer4492 3 місяці тому

    These Ft-901s were the top of the line radio in their day. I’ve been running one as my backup rig for a few months. Killer receiver and rejection filtering.

  • @G7LJL-Steve_Murton
    @G7LJL-Steve_Murton 3 місяці тому

    Great to see the vintage units I longed for in the late eighties early nighties. Hope to see part 2. Regards steve

  • @eie_for_you
    @eie_for_you 3 місяці тому

    Gotcha! 🙂

  • @MichaelRusso
    @MichaelRusso 3 місяці тому

    I bought one at a good price. I am thinking of using banana plugs so I can use different cables, however, I see on lines are grounded. Not sure how that will work out. I might test before committing.

  • @N2FQ
    @N2FQ 3 місяці тому

    Nice video. Learned something. I was wondering if the M (memory) enabled might something to do with digital display. Looking forward to the follow up. Fernando N2FQ/6

  • @DoubleHaulCharters
    @DoubleHaulCharters 3 місяці тому

    I really enjoyed this one , especially seeing the VFO. And 720p is back! Thanks.

  • @matthewdempsey6583
    @matthewdempsey6583 4 місяці тому

    my qyt-KT8900 microphone works perfectly

  • @user-pc9it3kt2o
    @user-pc9it3kt2o 4 місяці тому

    Why the low res?

    • @toddanonymous5295
      @toddanonymous5295 4 місяці тому

      Hi Joseph, I'm sorry for the low resolution. My camera is a Canon Vixia HFR600. I will have to get a better camera as I want the videos to be helpful. In the meantime I will improve lighting. Please advise if you can think of any other improvements I can make . Thank you for the comment.

  • @willthecat163
    @willthecat163 4 місяці тому

    How did the battery pack work out? (You are braver than me.I would be afraid of burning my place down.)

    • @toddanonymous5295
      @toddanonymous5295 4 місяці тому

      Hi Will, The battery pack is working good. I try to match harvested cells as close as possible. Also what is most important is using a battery protection circuit, especially with series strings. The charging current is low enough, and the maintenance circuit protects against both shorts and excessive charging. It is wise to be cautious anytime working with lithium cells. These cells also have a built in disconnect mechanism ( under the positive cap) that open the circuit with excessive current. Thanks for the comment.

  • @QuillHyde
    @QuillHyde 4 місяці тому

    great work!

  • @grampsradio
    @grampsradio 4 місяці тому

    Must be nice to be wealthy.

  • @eie_for_you
    @eie_for_you 4 місяці тому

    interesting

  • @jimbanner180
    @jimbanner180 4 місяці тому

    Great video ! Thanks for the effort and looking forward to more of the same.

  • @t1d100
    @t1d100 4 місяці тому

    I posted a long comment with a lot of helpful tips. I did not include any links. Even still, YT deleted it. IIRC, you can list me as some sort of a preferred commenter and I can post it. If you care to do that.

  • @Skyler_Hagen
    @Skyler_Hagen 5 місяців тому

    It looks like next to adjustment R741 up by your high voltage oscillator, it’s stamped “1675v ADJ” which would imply that the 1665ish volts you were measuring were actually very close to correct. It’s odd that the schematic calls for over 2300 or so.

    • @toddanonymous5295
      @toddanonymous5295 5 місяців тому

      Hi Skyler, I maxed the setting of the adjustment but still was unable to increase the voltage. I have solid state HV diodes on order and it will be interesting to see if decreasing the load on the HV transformer improves operation. This unit has a lot more problems and I am not sure it it is worth the time and materials to get this scope back into shape. I have a thing for Tektronix scopes , and once started it is hard to know when to stop.

  • @user-rk1bf4eh2p
    @user-rk1bf4eh2p 5 місяців тому

    When I was a little kid in 1962 the next door neighbor was listen to all of that stuff and amazed us kids when we used to go over and watch him work on that stuff

  • @eie_for_you
    @eie_for_you 5 місяців тому

    Not surprised that it had so many issues given its age and apparent condition. Thanks for the troubleshooting tour.

  • @QSasquatch
    @QSasquatch 5 місяців тому

    Yes, drill it out.

  • @mikebond6328
    @mikebond6328 5 місяців тому

    Freudian slip. 😅

  • @ovalwingnut
    @ovalwingnut 5 місяців тому

    You R the "RF Whisperer" Just saying. Thank you for the detailed walk-through. Cheers from So.Ca.USA 3rd House On the Left. p.s. I noticed I'm subscriber 666 and I have to be honest, should I be worried? Ah... I'll risk it

    • @toddanonymous5295
      @toddanonymous5295 5 місяців тому

      Thanks ovalwingnut. Glad you enjoyed it. I thought about beautiful So. Cal. weather today as I was shoveling snow.

  • @bob_mosavo
    @bob_mosavo 5 місяців тому

    Thanks 👍

  • @alexishauf2097
    @alexishauf2097 5 місяців тому

    Promo>SM 🏃

  • @CB-RADIO-UK
    @CB-RADIO-UK 5 місяців тому

    Lovely old radio.

  • @jimbanner180
    @jimbanner180 5 місяців тому

    Hi, It would be great if you could make a video showing how to align the receiver. I don't have a lot of test equipment but would like to see how it is done. Thanks

    • @toddanonymous5295
      @toddanonymous5295 5 місяців тому

      Hi Jim, Since there is interest in alignment procedures I will put a video up soon using this receiver as a subject. Stay tuned.

  • @DoubleHaulCharters
    @DoubleHaulCharters 5 місяців тому

    I enjoy your videos but wonder why the video resolution is just 360. Is this the limit of the camera or a bandwidth issue? Thanks!

    • @toddanonymous5295
      @toddanonymous5295 5 місяців тому

      Hi , and thanks for the comment. I will see what I can do to improve my video quality. Another thing I need to do is improve the lighting.

    • @DoubleHaulCharters
      @DoubleHaulCharters 5 місяців тому

      @@toddanonymous5295I noticed you using a flash light in this video! I'm looking forward to your next video.

  • @Crmsnraider
    @Crmsnraider 5 місяців тому

    Coolio; listening on my Allied 395 receiver. *THumbsup*

  • @capndavey1
    @capndavey1 6 місяців тому

    just picked one of those up at a hamfest 40 dollars nice little repeater at that price

  • @USA-GreedyMenOfNoIntegrity
    @USA-GreedyMenOfNoIntegrity 6 місяців тому

    Thanks for sharing your knowledge with us.

  • @larryboekeloo5514
    @larryboekeloo5514 6 місяців тому

    I so enjoy your trouble shooting skills and showing us what you''re doing. Thanks so much!!!!

  • @t1d100
    @t1d100 6 місяців тому

    Suggestion... I do not have solder tweezers, but you might try using them to hold a piece of solder wick to mop up solder. Might be better than fumbling with holding everything by hand and getting burnt fingers, which I do. If you try that, please let me know the results.

    • @toddanonymous5295
      @toddanonymous5295 6 місяців тому

      Hi t1d100, Thanks for the suggestion. I will give it a try.