[SBE] Gates FM Solidstatesman TE-3 Exciter

[Curt Yengst]

Thanks.
 
I've got the manual, and am in the process of poring over it to see if I've missed anything.  You are right, the final stage of the amplifier is built around a matched pair of transistors.  I'm starting to suspect the problem is still within the Modulated Oscillator, because the "MOD OUT" reading on the AFC module (which I assume is the RF output of the MO) is way too low.  It should come as no surprise then that the "PA OUT" reading is also in the cellar.
 
 
 
 

________________________________

From: sbe-bounces at sbe.org on behalf of ag4xm at fuse.net
Sent: Tue 6/9/2009 11:39 AM
To: sbe member discussion mail list
Subject: Re: [SBE] Gates FM Solidstatesman TE-3 Exciter



Curt,
The TE-3 was pretty good at holding frequency over time compared to its predecesor the TE-1 as long as you got the osc freq close enough for the AFC to lock  but was still very sensitive to microphonics.and LF overshoot.  I can see where soldering in the MO transistor (isn't it at like 74Mhz?) would help if the socket connection was microphonic. Can't think of anything there would cause a partial loss of drive like that though.
It should make 10 watts on a good day.  Sounds like one of the output transistors on the amplifier module is toast. I believe it was a complimentary pair but memory fades.
I agree with George's suggestion to replace all of the caps.
I'll  see if I can dig up a copy of the manual if you need it
Sent via BlackBerry by AT&T

-----Original Message-----
From: "Curt Yengst" <cyengst at star991fm.com>

Date: Tue, 9 Jun 2009 11:05:03
To: <sbe at sbe.org>
Subject: [SBE] Gates FM Solidstatesman TE-3 Exciter


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