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This is how I broadband some radios to increase their frequency range. I had a GE 3-5804D (PLL02A) that went from 25 MHz to 30 MHz, with about .5 watt drop in power from center to band edges, the entire 511 channel bandwidth of the PLL. I made my own FM boards too, on perfboard. It looked...

What are the crystal frequencies? There are 2 grey heat shrink covered crystals on the top of the switch board, and looks like 2 more on the bottom of that switch board. They are going into an epoxy covered board that has 2 coils, and what looks like a TA7310 oscillator/mixer IC like what is...

TR32 looks like it has been desoldered and removed. Can't tell if there were any other things done (cut/removed) from the solder side of the board.

Very very old post

142 Tripler Offset with Clarifier. Notice C127 (220pf) from Emitter to Ground. C2000 (148 et al) has a second varactor circuit in place of the 220pf above, added to the Emitter of the 11 MHz oscillator, this is what gives the 2000/148/Grant the extended slide range, compared to the...

My guess is that the DMU is using a video mode or resolution that the KVM can not "see" to pass through. Check the specs on your KVM.

https://www.worldwidedx.com/threads/galaxy-n-kit.265405/ https://cbworldinformer.com/channel-board-for-cobra-146gtl-uniden-pc-122xl

https://www.repeater-builder.com/radio-shack/htx-10/htx-10-service-manual.pdf I have 2 of these.

Do you need just 1 or want to duplicate for later sales? I have 4 or 5 new old stock here, and a B (PLL version) too.

His oscillator has 1 trimmer cap per crystal, like an Expo100 A kit. I got them out of my storage a few months ago, and have them in one of my bins here at my place, but need to unbury them again. Several Viagra A style boards, and a B style with PLL. The B style only uses diodes to switch or...

Those spurs do not have any modulation components like the fundamental. Only carriers.

If you are going to pull D19, make sure to swap it with another 5.1v Zener before turning it back on, if you just cut D19, that will unleash 13v into the PLL. It needs to be voltage regulated.

Check the voltage at JP1 next to the PLL and C153, this is part of the voltage rail for the PLL and VCO IC's. Pin 11 (bottom right corner) and 16 are listed as VCC for the PLL. If it is Zero, pull and check C112 (red circle). D19 (5.1v Zener) could also be shorted...

Ground the RX side of that section of the relay, disconnect the TX side. Or, unsolder the Red wire back at the relay, solder it to Ground.

https://rigpix.com/cbfreeband/president_hr2510.htm Rigpix says late 1988

Not the coil, you just have to find the same blue slug and replace it. Could try the red slug too, see if that works.. That coil is in the 455kc 2nd IF chain.

W4KVW might still have one https://www.worldwidedx.com/threads/vintage-webster-bandspanner-80-10-meter-mobile-antenna.254061/#post-828017

CBTricks .org - https://cbtricks.org/radios/realistic/trc_432/

Seller is also in ShenZhen CN.