Certainly, find and fix the noise before doing any mods.
73 de W3NU
On 2/14/2014 0208, Adriano wrote:
John
I'm not a technician but i'll suggest to check what's wrong ( "common"
tube stuff such as power supply caps, rotary switches and tube sockets
cleaning etc etc ) before any mod .
I've just repaired mine ( it was a tube fault, nothing serious ) and
it work like a charm. I don't have any mod and i don't want to. I'm
keeping every "vintage" stuff on its original "shape".
The reason is : if I have an R-4C with modifications....isn't a R-4C
anymore...if i want a solid-statd rig i have plenty to play with...but
that's me .
Check if any cap has leakage, try to swamp tubes with spares and good
luck !
'73 de Adrian iz3svi
----- Messaggio Originale -----
Da:
"John Boyle" <[email protected]>
A:
<[email protected]>
Cc:
Inviato:
Thu, 13 Feb 2014 20:33:35 -0500
Oggetto:
[Drakelist] R-4C Sherwood mods
I just acquired an R-4C, s/n 23xxx, in excellent condition. It
has the 3 CW filters and the 6kc AM filter, but no other changes.
It works well but has an S7 background noise that is not present
on my Ten Tec Corsair II. I'm planning on installing several of
the Sherwood mods, but not all ot once. What mods would produce
the most improvement and in what order should they be
incorporated? I can do the work myself. I have the original
owners manual with the schematic #11017421000. Thanks for your help.
John Boyle, VE3PMA
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