[Drake] TR-7 - Part two

[Dr. James C. Garland]

Guillermo, I'm going from memory, but I recall that all TR-7s have reduced
output on 10m. I seem to remember getting 60-70W from mine on 10m. It may be
there's nothing wrong with your radio, especially if you're getting normal
output on the other bands.
73,
Jim Ww8ZR 

> -----Original Message-----
> From: drake-bounces at mailman.qth.net [mailto:drake-bounces at mailman.qth.net]
> On Behalf Of GGLL
> Sent: Wednesday, December 03, 2008 7:12 PM
> To: Drake
> Subject: [Drake] TR-7 - Part two
> 
>         Well, I've further checked the final amplifier; its components
> read
> within tolerance; with the exception of idle currents, 400 mA for
> drivers, 130 mA for finals. I've reset them to 200 mA and 600 mA
> respectively.
> 
>         Anyway, 10 mtr. band still is way down in my wattmeter scale
> relative
> to the other bands, 40..50 watts at most, and this when predriver adj.
> is set for full gain (but in this situation, 80 Mtr. self oscillate).
> 
>         Final transistors tested ok in "diode" test mode, but, they have
> small
> inverse leakage  from both enitter and collector to base (500 Kohms)
> when tested with analog multimeter (R * 1K). Bases are left open,
> unsoldered.
> 
>         Any opinion, tip, etc. is surely welcome.
> 
> Thanks in advance
> 
> Regards
> Guillermo - LU8EYW.
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