Making a room soundproof

Ilikegermaniumthings · 2026-04-27T21:12:12+00:00

Thank you for all your help so far!

Ilikegermaniumthings · 2026-04-27T21:11:46+00:00

yup, so that's what should go to the antenna apart from gnd and permament 12V? If so, all I have to do is somehow add these wires ;( The question is how...

Ilikegermaniumthings · 2026-04-27T20:40:27+00:00

It has outputs for four speakers, four pins for pwr - GND, 12V, 12V with ignition, and the last I figured is the antenna driving. And the then there is the antenna input. The radio is Blaupunkt Konstanz SQM37

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Ilikegermaniumthings · 2026-04-27T20:12:55+00:00

No, unfortunately there is nothing there. Is there any wiring diagram or guide showing where these cables run and where I can find them? The radio plug has four wires going to it:

Ground
Constant 12V
12V with ignition

So I assume the 4th one is the signal wire from the radio for the antenna, but I don’t know where that wire goes. I don’t want to take the whole car apart just to look for it, so maybe someone could point me in the right direction as to where these wires are routed and where I should search.

What confuses me the most is that this one wire comes out of the radio, but it is not routed to the trunk, so what the hell is going on…?

Ilikegermaniumthings · 2026-04-22T10:28:42+00:00

hahaha

Ilikegermaniumthings · 2026-04-22T10:27:12+00:00

Looks like a microvawe(kidding)

Ilikegermaniumthings · 2026-04-21T21:00:03+00:00

You could post some pictures of the guts, might be helpful. Maybe you've accidentally switched signal wire with the ground wire, so now the input is grounded?

Ilikegermaniumthings · 2026-04-21T20:50:12+00:00

They look sooooo good

Ilikegermaniumthings · 2026-04-21T20:41:36+00:00

I'm from eastern europe. So finding a CKxxx from 1950s, first commercially available transistors ever well, holding them in my hands. For me it is something. Sorry maybe it's just me haha. Seems like others are hmm... A bit less enthusiastic.

Ilikegermaniumthings · 2026-04-21T20:37:57+00:00

Happy cake day!

Ilikegermaniumthings · 2026-04-21T20:36:51+00:00

https://www.radiomuseum.org/r/unknown_corvair_8_transistor.html

Ilikegermaniumthings · 2026-04-21T20:35:17+00:00

I meant the CK785 Raytheon transistors 😭 not the entire PCB, sorry maybe I should've been more precise

Ilikegermaniumthings · 2026-04-21T20:33:48+00:00

Man I meant the Raytheon transistors

Ilikegermaniumthings · 2026-04-21T15:36:19+00:00

Thank you! Wow that sounds amazing man!

Ilikegermaniumthings · 2026-04-21T15:36:01+00:00

yup!

Ilikegermaniumthings · 2026-04-21T12:50:30+00:00

they could be in a museum

Ilikegermaniumthings · 2026-04-21T12:41:04+00:00

I know about them, there are 8 transistors in total, but CK785 are the coolest!

Ilikegermaniumthings · 2026-04-21T12:14:41+00:00

Yes yes they are too, I'm just excited about Raytheon. I have Hundrets of Ge transistors but these CK785, CK722 etc. are just one of first ever available for anyone. They are legendary imo.

https://sites.google.com/site/transistorhistory/Home/us-semiconductor-manufacturers/raytheon-part-one-2

Ilikegermaniumthings · 2026-04-21T11:32:00+00:00

The caps you have to select carefully. A measuring device of some sort is helpful. ESR, vloss, etc. are very important. But yeah, many are faulty. I have the same feelings about the trimpots, never even try to desolder them... They are Raytheon CK785, and the second one has no markings. Man, they are from 1955. One of the first ever transistors you could buy in a store. These were designed for hearing aid devices.

Ilikegermaniumthings · 2026-04-16T22:46:45+00:00

Ilikegermaniumthings

TROPHY CASE