The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

I've changed out an mb8719 for an mc145106 a few times over the years. I leave the 8719 nearby and use pins 1-4 to filter the PD from 145106. Mod done mainly to give an exact 5kc jump using pin 17, by tying pin 6 to ground (FS=5 Khz steps) and shifting the PLL control lines from the channel switch a...

Hi Rick, hope your doing well. can you send me the info for this mod please. Thanks

Thanks for that link, but it looks like I might have to fork out a pretty penny for the info though. Cheers.

Hello fellow enthusiasts, does anyone have a schematic and/or service manual for a Johnson Viking 4740? I have had this old classic for a while which is working fine but it has never had a complete tuneup. I think it deserves one, so any info or recommendations of common dry caps/parts to replace wo...

I appreciate that info Rick.
Credit to everyone involved here, a mine of information.

Hi all, can someone please tell me of an easily obtainable sub(s) for 2SC3242, it's to be used as Q31 on a PB-062 or PB-122 board, in a Uniden PC122. Thanks.