[TMC] GPR-90

[Richard Knoppow]

    I am looking for someone with actual experience with the 
GPR-90 and GPR-90RXD receivers. There is a review on the web of 
the GPR-90 which complains that the BFO pulls on strong signals. 
This is pretty rare in well designed receivers but I see that in 
the RXD version the BFO has been redesigned and is coupled in a 
different way. I wonder if pulling is the reason. The RXD has a 
number of changes beyond making it more suitable for diversity 
use suggesting that the original design needed some refining. 
Particularly, the whole front end is different, the grounded grid 
amp being replaced with a conventional pentode amp.
     The GPR-90 is an intriguing receiver but gets mixed reviews. 
I wonder about its performance in the hands of someone who 
understands it and also has aligned it properly. I see all too 
many reviews of receivers that are just bought used and fired up 
with no attempt to make sure they are working properly. I have 
enough experience with the SP-600-JX to think there are a lot of 
them which are really broken but are still working leading some 
some strange complaints. I think the GPR-90 was aimed at much the 
same market but at a lower price. Also, does anyone run it with 
one of the TMC SSB adapters, what comments on the combination?

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL