How sensitive is it if you inject a signal directly after the BPF at
connector 32 on the RF mixer board? That would eliminate a lot of the
front-end diode switching.
PS - not sure why R25would burn out - it doesn't carry any DC current
according to the schematic.
Steve G3TXQ
On 31/08/2018 17:20, ROLAND HOWELL via TenTec wrote:
Hi SteveThanks for replying my shout for guidance on the ARGOSY 2 525d problem that I
have.Yes it is the same on all bands.Now on removing the top cover to look at the innards
I saw on the mixer board I had 3 x burnt components 2 x 8.2ohm and 1 x 150ohm
resistors ( R,s 24-26),these changed as well as the associated small 'C,s, again no
difference ,I have followed the path back from the 'S' meter and replaced Q2 and Q11
on the if/audio board, no difference.Went back to the low pass filter ( the odd numbered
one 91696 not what is in the manual) and changed the BAT41 diodes in the sensing circuit,
you guessed it, no difference.HELP hi hiI have noticed that it seems to be off frequency,
I inject a signal of 7.050mHz but seem to get a better tone at 7.045mHz and a small bit
of life in the 'S' meter but it still requires a massive input signal in to show any
life, the TX indication is spot on.Regards73Snowy
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