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I'd try a 1k or up to 2.2k in parallel to see how fast it releases.

https://ham.stackexchange.com/questions/1336/why-do-we-use-lsb-below-10-mhz-and-usb-above-10-mhz-when-operating-ssb-hf

MMM used way too much reverb for my taste, and when replaying D-Rail's audio, should have been no reverb like it was live on the air. At least when he played phone conversations on the air, no reverb.

I used to completely disassemble them, to clean the wiper contacts and wiper boards, reset the switch springs and clean the power switch contacts too. The "ears" that hold each section together can be bent straight by using "Nippy" cutters, but don't use too much force, just bend each ear...

Board Ground is DC isolated from Chassis (Case) Ground, and has capacitors around the edge of the board to couple the grounds together for RF (which is an AC signal)., and to keep the radio from squealing.

The problem with FM in CB's or 10 meter radios is that the Squelch is AGC actuated, unlike a true FM radio which uses high frequency noise actuated Squelch, to go "Full Quieting" to open the Squelch. An FM detector (descriminator or other) generates "random" white noise when there is no signal...

Pin 11 - Grounding this drops you 320kc (or 32 channels from whatever Pin 10 is set to. If Pin 10 is high (normally open or floating) then Ch 15 becomes 26.815 MHz, or If Pin 10 is low (grounded) then Ch 15 becomes 27.455 MHz Pin 10 - Normally open or floating (pulled high with internal...

Most likely Euro multi Country versions, like UK or DE

Older Cybernet radios (G.E./Midland/Lafayette) used Common Cathode LED channel displays, where Uniden/Cobra/RCI/ etc... use Common Anode.

I din'do nuffin'. I din'see nuffin'. Or was that "I know nothing!" "I see nothing!" (Schultz)

Schematic says FM Power Adj W4

I concur with LC above. That's what I have always done with a broken tuning slug. Desolder the can, remove from the bottom, flip the slug.

I just noticed that there is an error in the schematic. These are the Negative Feedback Loop components, that limits the gain of the circuit. They SHOULD be from Collector to Base, not as originally drawn (Collector to Collector ?? ). Here is a corrected version. 15 Ohms seems a tad bit low...

https://cbtricks.com/radios/clear_channel_corp/ar3300/graphics/clear_channel_ranger_ar3300_sm.pdf Page 24 of 25 has the schematic for the amplifier on back. The 3300 and 3500 used the same amp if it was the high power model.

1.png is a 3pf NPO. The Underbar under the number indicates read orientation, this side down. The black top marking on the brown ceramic capacitor (usually under 100pf) indicates it is an NPO (Negative Positive Zero) Meaning its Temp Co is 0 ppm/°C at room temperature. Thus it is suitable for...

The lowest frequency that a modified (with switches) Cobra 2000 or 148/Grant XL MB8719 chassis will go down to is 26.815, or 320kc down from Ch 15 (27.135). Unless the offset crystal (11.325) is changed. See Page 3 of 4...

Oops, I thought that was an F connector. Could get an F Female to SMA adaptor from eBay or Amazon, I got a set of these from Amazon for my Nano-VNA (Vector Network Analyzer and Tiny-SA (Spectrum Analyzer) kits.

That is an F (75 Ohms impedance coaxial) to 300 Ohms impedance (twinlead) transformer, to use coaxial cable to the antenna instead of twinlead. The MLA "box" has F connectors on it, so should work fine.

https://antiqueradios.com/forums/viewtopic.php?f=5&t=283814

You are welcome.