Superstar 3900G or 148GTL/DX

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Redbandit
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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Thanks, I found it. The woes of being the new jack at this.. :crazy:
Thanks again. You guys been a big help.

John
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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Sammy or Claude, I purchased a mic for the Cobra 25 Ltd, a Superstar DM507-4, for the cobra radios. However, I'm not certain if the pin code is correct. I've always done the soldering of the wires to pins by color. I Google this and I got schematics showing names of the function; tx, audio lead, shield, receive, but the wires have colors. And I doubt one color is always asigned to that particular function?

This mic's pins are: 1- shield, 2- white, 3- red, 4- black. Would this be correct for this Cobra 25?
Thanks again,

John
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cb4ever104
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Re: Superstar 3900G or 148GTL/DX

Post by cb4ever104 »

Don't know John . Shield is shield obviously . White is usually audio . Use a multimeter on the red and black ones to find out which one is TX . When you key the mic the shield and red or black will give continuity . That's your TX . The other one will be RX .

Cheers
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Redbandit
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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Humm,
homework huh, lol. Ok. I'll try that. Thanks.
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Re: Superstar 3900G or 148GTL/DX

Post by cb4ever104 »

Redbandit wrote: 16 Sep 2020, 16:36 Humm,
homework huh, lol. Ok. I'll try that. Thanks.
Don't want to give you all the answers. It's all part of the learning curve 😀
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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14CS06
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Re: Superstar 3900G or 148GTL/DX

Post by 14CS06 »

Hello John

Please look at this link

http://www.cbcintl.com/docs/mikewire.htm

https://www.wearecb.com/cb-microphone-wiring.html

Image

double click this pic :arrow:

Image

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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Good morning Guys, I've a question about power supply. I have (see photo) a 13.8v 7 to 10amp PS. But when I connect radio to it and key, I hear a popping noise start and the the lights go dim.. That did happen when I took it yesterday to a tech, he said both radios are working fine, only that the superstar 3900G needed the pots cleaned. So..

My question is, I know the standard 13.8v, but what Amperage PS should I have for this radio, and whats the max..?
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cb4ever104
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Re: Superstar 3900G or 148GTL/DX

Post by cb4ever104 »

For a twin final Ranger radio , I'd say about 5 or 6A should normally be enough . Saying that the PSU in the photos that you've uploaded is a US 110V 60hz supply , so I wouldn't plug it in to the UK (240V) mains if I were you .

You can buy a 15-20A switched mode PSUs for next to nothing these days.
Last edited by cb4ever104 on 19 Sep 2020, 16:32, edited 1 time in total.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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Re: Superstar 3900G or 148GTL/DX

Post by 14CS06 »

Hello John

7A power supply should be sufficient

But 10 A would be better or on car battery

Input Voltage 13.8V DC nominal, 15.9V max, 11.7V
min. (positive or negative ground).
Transmit: AM full mod., 4A.
SSB 25 watts PEP output, 6A

I guess it worked from the start because the power coils L503 L504 got hot at one point

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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Thank you gentlemen, have a blessed weekend.
John
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Re: Superstar 3900G or 148GTL/DX

Post by Redbandit »

Thanks Claude, so when you say, the power coils got hot at one point, is that normal? Or typical of a radio? On another note, power supplies are not costing Next to Nothing. Man they are Expensive here in the USA (NYC).

A 12 Amp is about $65, a 22 or 30 amp is $80 - $125.. Spent part of yesterday looking online and ebay for a deal. No luck. Smh..
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cb4ever104
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Re: Superstar 3900G or 148GTL/DX

Post by cb4ever104 »

If you don't want to spend the money then there's always this option .
These were about £7/8 used the last time I looked .

S.
Last edited by cb4ever104 on 20 Sep 2020, 10:53, edited 1 time in total.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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The Collector
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Re: Superstar 3900G or 148GTL/DX

Post by The Collector »

cb4ever104 wrote: 20 Sep 2020, 08:58 If you don't want to spend the money then there's always this option .
These were about £7/8 used the last time I looked .

S.

I bought a couple of the PS supplies (1st link is dead for me) for literally a couple of pounds each a few years back (mentioned on a topic about them at the time) and sold them for about £8-£10 each at a car boot sale.

Some people also use computer power supplies as they're pretty cheap and readily available too. Just ensure any mains connectors are safely covered though as usual.
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cb4ever104
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Re: Superstar 3900G or 148GTL/DX

Post by cb4ever104 »

The Collector wrote: 20 Sep 2020, 10:25 (1st link is dead for me)
Sorry . Just copied Chris's old post . Here's a search from today

https://www.ebay.co.uk/sch/i.html?_from ... =0&_sop=15

S.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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Re: Superstar 3900G or 148GTL/DX

Post by ch25 »

Very good and rfi free power supply's.
Chris
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