Search found 385 matches

by Goldfinger
Wed Feb 14, 2018 1:49 pm
Forum: rx and tx mods
Topic: Uniden PC-122, PC-122XL
Replies: 5
Views: 1765

Re: Uniden PC-122, PC-122XL

I never posted up the 146GTL mods. I'm busy for a couple days but I'll take a look at the schematic when I get a minute.
by Goldfinger
Mon Feb 12, 2018 10:19 pm
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 3
Views: 15

Re: Sonar FS-2340

Looks like it would be easier to inject after the clipper. I'll write up how tomorrow or the next day.
by Goldfinger
Mon Feb 12, 2018 10:04 pm
Forum: rx and tx mods
Topic: Galaxy 900 series radios 919 through 979
Replies: 8
Views: 3178

Re: Galaxy 900 series radios 919 through 979

Change C155 to a .001uF ceramic disc for more TX highs.
by Goldfinger
Wed Feb 07, 2018 1:21 pm
Forum: rx and tx mods
Topic: Uniden PC-122, PC-122XL
Replies: 5
Views: 1765

Re: Uniden PC-122, PC-122XL

I think the 244 is similar but not the same. I think it's more like a 146GTL
by Goldfinger
Wed Nov 29, 2017 2:48 pm
Forum: rx and tx mods
Topic: Cobra 142GTL cap changes
Replies: 3
Views: 296

Re: Cobra 142GTL cap changes

If you measure which hole is more positive you can but I've found it still doesn't work much of the time as both sides of the circuit have some random + voltage on them and doesn't want to work right. It's easier just to get the right caps. I always use "new" caps when I modify a radio so ...
by Goldfinger
Mon Sep 11, 2017 6:40 pm
Forum: rx and tx mods
Topic: Cobra 142GTL cap changes
Replies: 3
Views: 296

Re: Cobra 142GTL cap changes

Receive: Change C91,C28, C108 and C110 to 2.2uF-4.7uF non polarized Change C 118 to a 1000uF, 25 volt Electrolytic, observe polarity More highs? Make C25 lower in value Transmit: Change C121 to a 4.7uF, 16V Electrolytic or Tantalum, observe polarity Change C86 and C82 to 2.2uF-4.7uF non polarized M...
by Goldfinger
Wed Sep 06, 2017 1:42 pm
Forum: rx and tx mods
Topic: 25LX
Replies: 3
Views: 188

Re: 25LX

Yes, finally back to normal. Thanks
by Goldfinger
Wed Sep 06, 2017 8:19 am
Forum: rx and tx mods
Topic: Uniden HR-2510 RX/TX, hi-fi mods
Replies: 3
Views: 2208

Re: Uniden HR-2510 RX/TX, hi-fi mods

Back hole of C147
by Goldfinger
Mon Sep 04, 2017 8:11 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 351

Re: Realistic TRC-465

Thanks
by Goldfinger
Mon Sep 04, 2017 3:25 pm
Forum: rx and tx mods
Topic: 25LX
Replies: 3
Views: 188

Re: 25LX

Receive: C32, C56: change to 2.2uF Non-polarized RX/TX: C67: Change to a 1000uF, 25 volt electrolytic, observe polarity Transmit: C97: change to a .001uF disc or mylar C90: change to a 1.5uF - 2.2uF 16V Tantalum or electrolytic, observe polarity C89: change to somewhere between .068uF to .22uF Beca...
by Goldfinger
Fri Sep 01, 2017 8:34 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 351

Re: Realistic TRC-465

Transmit: C111: Change to 2.2uF-4.7uF, 25 volts or greater, non-polarized C108: This cap is for positive feedback so making it smaller shifts the boost frequency higher. Change to .005uF, 16 volt or greater disc or Mylar C104: This is the SSB Bal-Mod cap. Change to a 1uF-2.2uF 25 volts or greater, ...
by Goldfinger
Fri Sep 01, 2017 3:42 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 351

Re: Realistic TRC-465

I wish people would scan schematics with at least 150dpi. It's a waste of time to post blurry ones. (I'm not talking about you a365) So many of the schematics at cbtricks are low res. This one looks like 50dpi or less... lol
I'm looking now and will post soon. Thanks for the schematic :mrgreen:
by Goldfinger
Tue Aug 29, 2017 10:09 am
Forum: rx and tx mods
Topic: direct injection on a Cobra 29 LX
Replies: 25
Views: 3797

Re: direct injection on a Cobra 29 LX

If you just want it hi-fi through the mic jack, the 29LTD mod on the forum is the ticket.
by Goldfinger
Tue Aug 29, 2017 10:03 am
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 351

Re: Realistic TRC-465

i was ill for a week and not around. I'm still not %100 but I'll get to it soon once I feel a little better.

cheers!
by Goldfinger
Tue Aug 29, 2017 9:51 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Powermic for keying
Replies: 3
Views: 151

Re: Powermic for keying

For awhile, Doc Adams used one of these:

Image

:mrgreen: :lol:
by Goldfinger
Tue Aug 29, 2017 9:47 am
Forum: rx and tx mods
Topic: 142-2000 Direct Injection
Replies: 4
Views: 233

Re: 142-2000 Direct Injection

The C945 usually blows out first (when you get yelled at for not taking out the trash)... ;) Use a brick-wall limiter in your chain and set the wall at your desired max modulation level. The first 2grand I ever made was for Prime and he learned quickly the first time someone came into his shack yell...
by Goldfinger
Wed Aug 16, 2017 3:55 pm
Forum: rx and tx mods
Topic: 142-2000 Direct Injection
Replies: 4
Views: 233

Re: 142-2000 Direct Injection

The 8 ohm resistor would replace the paralleled 1K, not the Teflon cap to be current fed. The Teflon cap in the picture is in parallel with the red Tantalum. I did that to lower the ESR of the pass cap for better transmit tone. (A trick carried over from esoteric audio and speaker crossover mods.) I...
by Goldfinger
Sun Aug 06, 2017 9:52 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Console V
Replies: 5
Views: 202

Re: Console V

Compression board:
Change C8, C10 and C11 to 4.7uF

SSB TX main board:
Change C727, C706 and C709 to 2.2 or 4.7uF Electrolytic

It looks like the output of the Balanced Modulator (SL1640) goes through C710.
Try changing it to a .22UF Mylar or Disc
by Goldfinger
Sun Aug 06, 2017 8:51 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: ss cx4000 direct injection - almost there !
Replies: 2
Views: 182

Re: ss cx4000 direct injection - almost there !

Let us know if putting the radio back together and shielding the cable fixed the problem.
by Goldfinger
Fri Jul 28, 2017 8:53 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Console V
Replies: 5
Views: 202

Re: Console V

I have a lot going on but I'll look at it over the weekend and get back to you.
by Goldfinger
Fri Jul 21, 2017 10:26 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

It's not necessarily the "original" swing mod, I only called it that because it was the first one I saw in a Galaxy radio when the Pluto was king(in the 80's). In other words it's the first swing mod I ever encountered for these chassis. It does work better than any of the other methods th...
by Goldfinger
Fri Jul 21, 2017 8:20 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

If it has the R281 mod, there will be a diode in series with it. Either remove the diode and solder the free end back down or if the leads are screwed up,just replace R281 with a fresh 4.7K.
by Goldfinger
Thu Jul 20, 2017 8:48 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

Yes, put R281 back to normal. If you need a swing mod that doesn't interfere with the direct injection, do this: Galaxyswingdiode1.jpg In your case though it will be the junction of C301, D99, R286 As you make the resistor lower in value, you will get more swing, even at lower dead keys. Some radio'...
by Goldfinger
Thu Jul 20, 2017 7:51 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

That radio have a swing diode installed on the modulator? (in series with R281)
by Goldfinger
Thu Jul 20, 2017 7:31 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

I apologize 31, I wasn't thinking about it in terms of stepping on toes, it wasn't my intention. I deleted any redundant posts and edited one (of mine) to keep the flow.
Once again, I am sorry.
by Goldfinger
Thu Jul 20, 2017 8:34 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

I have used polarized before and I connected the + to the resistor junction and the negative to the line-in jack, as there is some positive DC potential there.
by Goldfinger
Wed Jul 19, 2017 9:33 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Galaxy DX 2527 (EPT295013Z) Direct Injection Help
Replies: 25
Views: 564

Re: Galaxy DX 2527 (EPT295013Z) Direct Injection Help

The cap you inject through needs to be higher in value than the original.. Most people use between 2.2uF and 10uF. I'd use a 4.7uF-50V, non-polarized electrolytic.
by Goldfinger
Sun Jun 11, 2017 1:53 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: HI fi 148gtl
Replies: 26
Views: 3383

Re: HI fi 148gtl

Of course all of my experience with parametric EQ's was back in the 80's and 90's when I installed car stereos. Pretty much none of them had adjustable Q, just the center frequency and boost/cut adjustment. Now in the 21'st century, my Kenwood car stereo has a 3 band parametric EQ with adjustable ce...
by Goldfinger
Sat Jun 10, 2017 10:57 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: HI fi 148gtl
Replies: 26
Views: 3383

Re: HI fi 148gtl

"Parametric" means you can change the center frequency of each band. That EQ is 3 band with fixed center frequency. (80, 2.5k and 12k) A 3 band parametric would have 6 knobs. 3 for boost/cut and 3 for center frequency adjust.

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