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

My schematic came in today. The first IF Amp is TR6. I Want to thank everyone for all the help I got on this question. After all thats what forums are for Getting answers when you need a little help.

Here is the info I could find on my transistors can someone point out the right transitor for the upgrade. TRANSISTOR USES: TR1= NB AMP TR2= NB AMP TR3= NB AMP TR4= RF ATT TR5= RF AMP TR6= AMP TR7= AM TX AMP TR8= RX AMP TR9= RX AMP TR10= RX AMP TR11= AGC AMP TR12-14 = SQUELCH AMPS TR15= SSB DETECTOR...

Everybody keeps saying the 2sc1969 is hard to find and expensive. buy them here.http://www.rfparts.com/transistors_2SC.html#1906?OVRAW=2sc1969%20transistor&OVKEY=2sc1969%20transistor&OVMTC=standard&OVADID=46382280511&OVKWID=309115918011 If they are out of stock I have some I will sel...

I have the trc 457. It has the upd 858 like the 139xlr {same board number to I think} I changed the diodes in am detector and have the 2sc2999 transistor. I need to know which transistors to change. [quote ] I have done this mod in The Uniden Washington with the MB8719 PLL,the Cobra 148GTL,the Cobra...

I put the diodes in my trc 457 but now I need the transister upgrade. It was not to hard to relize the diodes was the am detector diodes but what transistor do I replace. Does anyone know where I put this transistor to finnish this upgrade.