[Milsurplus] T-282/GR MD-141A

[Bruce Gentry]

> Greetings,
>
> I have a chance to  pick up one of these 220-400MC AM beasts with the matching PS/Modulator.  A few questions for the group:
> Is anyone here using one?  (we have 2-3 guys on 220AM here near Boston)
> Did anyone try to use one and is willing to share horror stories?
> Is there anyone near Boston who is crazier than me that cant live without one and is interested in purchasing it as a fund raiser for the local ham club?
>
> John Flood   KB1FQG
> 978-979-2807
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>   
The GRT-3 (T-282 and MD-141) will work just fine on 220. The GRC-27 will 
too, even though the manual says no.  Power output and sensitivity will 
be degrade as you get farther down from 225, but that can be restored by 
fudging internal tuning adjustments. Doing this will seriously degrade 
it  outside of the 220 bands.  We had many unauthorized QSOs and even a 
few broadcasts on the 220 MC band in Southeast Asia!  Either of the rigs 
sound fairly good with the audio set for wideband. The Vietnam"I Think 
I'm a Fixen' to Die" rag  came through quite well. The GRC-27 receiver 
selectivity was wide as a barn door, and the audio transformers are 
fair,  so it didn't sound all that  bad.  The only horror story I can 
recall with a GRT-3 was a very intermittent sealed spark gap across the 
primary of the modulation transformer. Otherwise, they were solid as a 
rock. I had very few service calls on them. When restoring either of 
them, clean the striplines in the final tank circuit, especially on the 
GRC-27. Check, clean. lubricate all the tuning mechanics on them. 
Backlash and binding will seriously degrade performances, especially on 
the GRC-27.  Beware the final plate voltage, I had an encounter on a 
GRC-27, and it felt like someone hit my hand with a sledge hammer. Some 
of them we had were made by Radio Recepter, but the rest were.. "GEE 
DAD! It's a Wurlitzer!"

   Bruce Gentry,  KA2IVY