I was given the 302 version of this receiver a few months ago and they work reasonably well. You'll find that it'll probably work quite well on your standard CB radio aerial (once you've fixed it) - mine does! I can hear the old chaps down on top band LSB in the late evenings and receive long wave Radio 4 and Absolute Radio on medium wave AM just on a wire dipole tuned for 27 MHz stuck up a tree, so I suspect that yours will do the same. They drift a little bit as they warm up (noticeable more on SSB), but after that they're quite stable. I find the wide/narrow filter is a bit 'nasty' and generally leave it set to wide where it still seems to be fairly selective. As to the deafness, I suspect that yours has probably had a transmitter 'up it' or perhaps had an antenna connected when there was a nearby lightening strike. The outer tuning ring/band selector also acts as a fine tuner on each band and should be adjusted in conjunction with the pre-selector for maximum sensitivity. Replacing the lamps behind the pre-selector is fun, particularly one of them - they're 2 x 8 volt types in series, although I gather that some models just have the one single 14 volt bulb...luckily it was the easier of the two to get out that had failed on my set. Good luck with it.
A lot of the 'load of crap' type comments are from show-off's. The kind of people who swan round in an expensive car that they rent & the same kind of person that goes bankrupt every three years & thinks it's clever. At least as radio engineers we will apply the same instrument tests to radios whether they are £3.99 transistor radio kits from China or a £10K piece of commercial gear! Richard, G0OJF, UK
Recently got hold of a DX 200 through eBay, less than £70 boxed with manual. It's the one with the "drum" style tuning dials. It really is like new! Currently chasing a DX 302 to keep it company!!
I 've had the same problem, I changed the electrolytic capacitor 1000microfarad( c522) in the frequency counter board. My Dx302 work. Best73 from 7x2ym
Don't forget your DX-160! That series of videos is what brought me to your channel! In fact on the Realistic DX groups.io I just posted a link to the video where you build the infamous "I.E.C. Dummy Antenna" (of which yours is probably one of 3 in existence in the history of the world!) in response to someone asking if he really needed one for the alignment. Like this later unit, the DX-160 also covers the 160-m amateur band. In the USA, we do have 1800-2000 kHz and while there were once power and/or geographical limits, those have been gone for many years. But it ain't Top Band any more since we now have amateur allocations at 630 m and 2200 m!
Only 3' of wire from some crocodile clip leads. I hoped some strong station would come in, but no. As demonstrated with the signal generator, the radio currently requires a 74uV signal to resolve anything....that it around S9 equivalent. The radio should receive at 2uV. It'll be a duff MOSFET in the receive front end & I'll even get them ordered in advance of proving it. Richard, G0OJF, UK
Did you say there is a Realistic DX301?? if so I would like to see one. AS far as I amaware there are onlt 2 models te DX300 and the DX-302, but NEVER a DX-301.
IC501 M54826P which is expensive. When I changed it I looked at the circuit & changed all electrolytic capacitors in that part of the circuit as I believe the original chip was probably killed by duff capacitors. I made sure the capacitors were changed before fitting the new IC, which I think cost me around £30. Richard, G0OJF, UK
I'm waiting for part 2 too can you go into more details a little more. what did you do with the ground when you probed it with the oscilloscope? I have a 302 and it's almost identical to 300. I had it given to me it is CB swap meet. And only thing wrong with it is lack of sensitivity. I'm going to recap it then test it.
David, download & look at the service manual; no C-Quam stereo. The service manual I'm using is for the American version & shows the differences for Europe & Australia. Those differences only are around the mains transformer & power lead. Richard, G0OJF, UK
@@ukfmcbradioservicingTango21 Sorry C-QUAM was a thing in the states and there are a few stations actually broadcasting in stereo on Top Band in the states and actually the JRC NRD-545 has C-QUAM decoding it is just that you have to use the line out to be able to listen to it through an external amplifier so there is no reason why that Realistic communications receiver shouldn't have it also.
Wow. Took 8 minutes of irrelevant chattiness before getting to the problem. I admit to chuckling through it because it felt very British to me. I kept waiting for you to suggest it was time for a cup of tea. And where is your Realistic DX300 no KHz display & deaf Pt 2 (Part 2)? Did you get the replacement part? Did you ever fix it?
I got the part at great expense & it's yet to be finished. As a church pipe organ builder as well as an electronics engineer (never the twain shall meet!), I've had a continuous flow of pipe organ jobs, each taking around 12,000 man hours. You never know, 2024 may be the part 2 year. Richard, G0OJF, UK
I've no idea what a 'kernal' is in relation to this radio. Perhaps something is lost in the translation. Bear in mind I'm a service engineer specialising in 2-way radio. Richard, G0OJF, UK
Yes, it this 'crap with reference to what' which is always the situation. No doubt is when compared to gear 5 times the price but for the price at the time it's about comparing like for like. Anyway, hopefully the expensive IC will turn up tomorrow. T21
@@ukfmcbradioservicingTango21 i always found they were noisy, drifted, were a pain to tune it right, but we are talking 30 years or more ago when knowledge wasn't as great as it now.
I was given the 302 version of this receiver a few months ago and they work reasonably well. You'll find that it'll probably work quite well on your standard CB radio aerial (once you've fixed it) - mine does! I can hear the old chaps down on top band LSB in the late evenings and receive long wave Radio 4 and Absolute Radio on medium wave AM just on a wire dipole tuned for 27 MHz stuck up a tree, so I suspect that yours will do the same. They drift a little bit as they warm up (noticeable more on SSB), but after that they're quite stable. I find the wide/narrow filter is a bit 'nasty' and generally leave it set to wide where it still seems to be fairly selective.
As to the deafness, I suspect that yours has probably had a transmitter 'up it' or perhaps had an antenna connected when there was a nearby lightening strike. The outer tuning ring/band selector also acts as a fine tuner on each band and should be adjusted in conjunction with the pre-selector for maximum sensitivity. Replacing the lamps behind the pre-selector is fun, particularly one of them - they're 2 x 8 volt types in series, although I gather that some models just have the one single 14 volt bulb...luckily it was the easier of the two to get out that had failed on my set. Good luck with it.
A lot of the 'load of crap' type comments are from show-off's. The kind of people who swan round in an expensive car that they rent & the same kind of person that goes bankrupt every three years & thinks it's clever. At least as radio engineers we will apply the same instrument tests to radios whether they are £3.99 transistor radio kits from China or a £10K piece of commercial gear!
Richard, G0OJF, UK
My very first receiver 👍🇬🇧
Recently got hold of a DX 200 through eBay, less than £70 boxed with manual. It's the one with the "drum" style tuning dials. It really is like new! Currently chasing a DX 302 to keep it company!!
I do have a DX200, one day perhaps we'll have time to align it.
Richard
I 've had the same problem, I changed the electrolytic capacitor 1000microfarad( c522) in the frequency counter board. My Dx302 work. Best73 from 7x2ym
20 years! That is not bad for someone that is busy and it is his own. Your own gear is always the last to get looked at!
Correct.
Richard
Don't forget your DX-160! That series of videos is what brought me to your channel! In fact on the Realistic DX groups.io I just posted a link to the video where you build the infamous "I.E.C. Dummy Antenna" (of which yours is probably one of 3 in existence in the history of the world!) in response to someone asking if he really needed one for the alignment.
Like this later unit, the DX-160 also covers the 160-m amateur band. In the USA, we do have 1800-2000 kHz and while there were once power and/or geographical limits, those have been gone for many years.
But it ain't Top Band any more since we now have amateur allocations at 630 m and 2200 m!
I mentioned the DX160!
Richard
I have a 300 awaiting a recap, got the kit from the states and a 302 I listen to Caroline on
I'll recap this one when it works enough to prove I'm not wasting my time & money!
Richard
Was an antenna connected up? Silly question I know
Only 3' of wire from some crocodile clip leads. I hoped some strong station would come in, but no. As demonstrated with the signal generator, the radio currently requires a 74uV signal to resolve anything....that it around S9 equivalent. The radio should receive at 2uV. It'll be a duff MOSFET in the receive front end & I'll even get them ordered in advance of proving it.
Richard, G0OJF, UK
Did you say there is a Realistic DX301?? if so I would like to see one. AS far as I amaware there are onlt 2 models te DX300 and the DX-302, but NEVER a DX-301.
I think that was a slip of the tongue. Only DX300 & DX302 in gthis range.
Richard
which transistor or part should be changed to repair the display in khz
IC501 M54826P which is expensive. When I changed it I looked at the circuit & changed all electrolytic capacitors in that part of the circuit as I believe the original chip was probably killed by duff capacitors. I made sure the capacitors were changed before fitting the new IC, which I think cost me around £30.
Richard, G0OJF, UK
@@ukfmcbradioservicingTango21 thank you very much
got a dx-302 today £50 . hit the jack pot with it . ssb smashing threw all day . skips on a high
I'll screem and screem till i'm sick
coz you like or hate these sets?
@@ukfmcbradioservicingTango21 No never had or seen one , It's when you said you don't give a toss and don't care
No I get fed up of audiophile/radiophile types who thing they need gear that's NASA standard!
T21
Did you get it fixed, is there a part 2???
It's still pending, but I did order & receive the long obsolete part which I recall was £30.
Richard
I'm waiting for part 2 too can you go into more details a little more. what did you do with the ground when you probed it with the oscilloscope? I have a 302 and it's almost identical to 300. I had it given to me it is CB swap meet. And only thing wrong with it is lack of sensitivity. I'm going to recap it then test it.
That American receiver might have top band with C-QUAM encoded Stereo.
unlikely as it's a communications receiver
@@chippieminton21 The Americans were big into C-QUAM Stereo QAM encoded stereo around about the 1970's
David, download & look at the service manual; no C-Quam stereo. The service manual I'm using is for the American version & shows the differences for Europe & Australia. Those differences only are around the mains transformer & power lead.
Richard, G0OJF, UK
@@ukfmcbradioservicingTango21 Sorry C-QUAM was a thing in the states and there are a few stations actually broadcasting in stereo on Top Band in the states and actually the JRC NRD-545 has C-QUAM decoding it is just that you have to use the line out to be able to listen to it through an external amplifier so there is no reason why that Realistic communications receiver shouldn't have it also.
Wow. Took 8 minutes of irrelevant chattiness before getting to the problem. I admit to chuckling through it because it felt very British to me. I kept waiting for you to suggest it was time for a cup of tea. And where is your Realistic DX300 no KHz display & deaf Pt 2 (Part 2)? Did you get the replacement part? Did you ever fix it?
I got the part at great expense & it's yet to be finished. As a church pipe organ builder as well as an electronics engineer (never the twain shall meet!), I've had a continuous flow of pipe organ jobs, each taking around 12,000 man hours. You never know, 2024 may be the part 2 year.
Richard, G0OJF, UK
@@ukfmcbradioservicingTango21 Yeah ... Part 2!!
Bonjour je cherche soit un noyau ou un qui est en panne
I've no idea what a 'kernal' is in relation to this radio. Perhaps something is lost in the translation. Bear in mind I'm a service engineer specialising in 2-way radio.
Richard, G0OJF, UK
I always remember these old DX100, 200 and 300 were greta fun to use but for me were always crap.
but i'd love another just for the old retro feel.
Yes, it this 'crap with reference to what' which is always the situation. No doubt is when compared to gear 5 times the price but for the price at the time it's about comparing like for like. Anyway, hopefully the expensive IC will turn up tomorrow.
T21
@@ukfmcbradioservicingTango21 i always found they were noisy, drifted, were a pain to tune it right, but we are talking 30 years or more ago when knowledge wasn't as great as it now.