[Elecraft] K-3 Saga Continued

[David Hachadorian]

Maybe something here will help:
https://marc.info/?l=elecraft&m=145323127930319&w=2

Dave Hachadorian, K6LL
Yuma, AZ

On 3/14/2023 7:34 PM, Pete Smith N4ZR wrote:
> So, after many hours of fiddling around, I had to give up on the KIO3B 
> for the time being.  I made repeated efforts, being exquisitely 
> careful to make sure all the board-edge connectors were properly 
> meshed, and every time I came up with ERRIO3.  So at that point I 
> pulled the KIO3B parts, replaced them with the original KIO3A parts, 
> and the radio started up without any errors. I think I may have gotten 
> a dead-on-arrival KIO3BUPKT, and have written to Elecraft. Transmit 
> side seems to be fine - tested on a number of bands - as does the 
> interface with my KPA1500.
>
> One remaining crazy problem - the receivers, both the main and the 
> sub-RX, are VERY dead.  Band noise doesn't move the S-meter on any 
> band, and *almost* nothing can be heard.  It sounds to me as if what 
> I'm hearing on either RX is probably the result of incidental 
> coupling, and that it's likely that some shared RX signal connections 
> is open.  Can anyone who is intimately familiar with the K-3 suggest 
> which ones I might scrutinize?  I have the schematics but have not 
> been able to relate them to the physical reality.
>
> Thanks in advance
>