On Oct 25, 1:27 pm, cliff wright wrote:
Well I've got all my TX problems sorted out fine now.
However I am beginning to think that the receiver is somewhat noisy.
When set up as per manual I am getting about a S3 internal noise level
on sideband.
My unit has had the RF stage modified as per the International Radio
mods and also the balanced mixer. In the next few days I hope to have a
look at this problem too, it is possible that the mixer balance is not
very perfect for example.
It was also fitted with back to back 1N4148 diodes across the RX input
and these might just have been damaged with the tx problem.
Has anyone else had a similar experience with this rig?
Regards Cliff Wright ZL1BDA ex G3NIA.

Remove ALL the mods. Take it back to original - that way, you will be
looking for a fault rather than trying to figure out if its the mods,
faulty mods, something else, etc etc.

The original design engineers had a pretty good idea of how it was
supposed to work, published specifications in the manual, are based on
this. Your battling with "mods" - how can find any fault with
extraneous mods?

Get an established reference point, ie the service manual. Go forward
from there.....

Andrew VK3BFA.