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It was a travesty when International Crystal Manufacturing (ICM) of Oklahoma City announced in early 2017 that they were closing their doors after 66 years in business. Excellent crystals, great customer service and if they didn't have it, they would cut you one.
R.I.P. ICM...
The transistors are Motorola "super" SRF3775's. Select, high beta MRF455 drop-in upgrades rated at 75 watts. That box will rock with just a single final radio with all of that gain.
Remove R228
Find the wire from the center leg of the clarifier potentiometer and unsolder it from the main board.
Resolder it the the junction of L203/C230/R222 on the main board. This bypasses the RX-TX relay.
Ken's electronics was the last place you could get them new but even he hasn't had them for 15 years, The original part number was MX3P-12VDC. Looks like there are some on eBay right now...
I didn't think of that but I know what you mean. My terrible spine keeps me from doing many things my brain would like to get done.
To be 20 again.... ;)
To be clear, on my post I wasn't implying that dave457 and w9cll were stuffy. I was jokingly inferring that the CB camp and the HAM camp were both stuffy.
I had one of those back in the day. It got out equally to a Super Big Stick but only handled about 200 watts. If I remember correctly it had reverse threads in the middle where it screwed together so you couldn't screw on alternate whips like you could with the Shakespeare.
All of the Superscope mobiles (CB-140, CB-340, CB-640) use the same PLL board. The board is double sided and has several feed-through eyelets that connect the top traces to the bottom traces. They are notorious for losing connection. 9 out of 10 times that one of these radios is having...
There is no handy AM Power adjustment on the 32XLR but you can lower the dead key while keeping peak power by using a dropping resistor/parallel cap on the driver (like is done on the 29LTD Classic).
Remove R50 and experiment with the value until you get the desired dead key. (it will probably...
Hard to find a clean datasheet for the 1182H. On the one I did find it looks like pin 1 is the input. Lift pin 1 and check if both the receive audio goes away (verifying that pin 1 IS the input) and see if the popcorn noise remains. If the noise remains the IC is probably bad.
Once in awhile...
I have found that a failing audio chip can cause snapping/popping/white noise that's not affected by the volume or squelch. If it has a TA7222AP IC, lift pin 4 from the trace and check if the noise remains. If you still hear it, the audio IC needs to be replaced. If it goes away, it must be...
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