Differences
This shows you the differences between two versions of the page.
585agc_rfg [2007/05/21 00:44] |
585agc_rfg [2007/05/21 00:44] (current) |
||
---|---|---|---|
Line 1: | Line 1: | ||
+ | ====== Paragon AGC / RF Gain / Audio Stage Mods ====== | ||
+ | **From the Ten-Tec Reflector December 26, 2002** | ||
+ | |||
+ | Here are some mods that I just put into my Paragon (I): | ||
+ | |||
+ | If slow AGC is too fast for you, pull the IF/AF board and change C46 from 10 uf to 22 uf. Fast AGC is unaffected. If 22 uf makes it too slow, try 16 uf. I'm trying 22 uf, for now. | ||
+ | |||
+ | My RF gain control has always been touchy: Crank it back below 12 o'clock and the signal level abruptly drops to nil. Here's a fix to | ||
+ | improve it: On the IF/AF board, change R47 from 4.7 k to 10 k. Also on the POT board connect a 22 k resistor from the high voltage side of the RF gain POT to the wiper. | ||
+ | |||
+ | If you Paragon audio stage oscillates when using the internal speaker, check connector 57 on the sidetone board for a poor connection on the shield ground. Make sure the shield is tight in the plug, and check the socket for tarnish I put a little De-oxit on the connector pins and mated and unmated the connector several times to wipe the contacts clean. | ||
+ | |||
+ | If you ever remove the sidetone board, make sure that you don't forget the plastic shoulder washers that insulate it from the chassis. If toy ground the board, it will cause a ground loop resulting in audio hum. | ||
+ | |||
+ | 73, | ||
+ | |||
+ | Bob WB2VUF | ||