[Amps] Attenuation of signal

[Jim Thomson]

Date: Sat, 20 Jan 2018 10:53:38 -0500
From: "john shea" <w3khg at triad.rr.com>
To: <amps at contesting.com>
Subject: [Amps] Attenuation of signal

<The Amp International LK500-ZC which I picked up couple weeks ago has
<another issue besides the fan. Running an FT-1000mp with it. When I tune in
<a cw signal that is S7 and then put the amp online in standby the received
<signal will drop two S units, S5. What could cause this or areas to check.

 

<73

<john

##  I was going to  say the relay contacts..... BUT u indicated  the signals are good on RX, with
amp powered OFF.    This baffles me.   With amp on..and on stby, sigs should not drop.  What happens
if u toggle the ptt several times, to  activate the relays several times ??   It could still be a dirty contact. 

##  On my hb amps, I use a vac relay on the input side..and also the output side..ans a 3rd vac relay for the
cut off bias.   Then no more  int bad contacts on RX  issues ever again.   Then u can also incorporate 
qsk at the same time..if required. 

Jim    VE7RF