[Boatanchors] Replacing rect tubes with diodes question

[jeremy-ca]

You'll get numerous suggestions as this is a favorite subject for years 
running.

The simplest solution is to drop the AC line down to 110V or so. You can do 
this with a Variac or a small 12V filament transformer.

For my work bench I use a 7A Variac feeding a 8' long outlet strip. In the 
shack and throughout the house I use 3-5A 12V filament transformers built 
into a double duplex steel outlet box along with a Doug DeMaw line filter. 
Since only the secondary of the transformer is used only it has to be rated 
for the load; in your case 1A is sufficient.

Switching to SS diodes will save 10-15W and the slight extra voltage will 
not hurt anything, period. I assume the S-40 has been recapped.

You can combine both steps above.

The 6H6 draws such little power it doesnt need to be replaced, however 1N270 
diodes usually work well but I havent done a S-40 swap.

Carl
KM1H
----- Original Message ----- 
From: "WØQFC" <erastber at tampabay.rr.com>
To: "HALLICRAFTERS" <hallicrafters at mailman.qth.net>; 
<boatanchors at mailman.qth.net>; <FLBOATANCHORS at yahoogroups.com>
Sent: Wednesday, February 13, 2008 8:48 AM
Subject: [Boatanchors] Replacing rect tubes with diodes question


>I want to replace the # 80 in my S-40A with diodes so I can reduce heat by 
>less draw on the tranny.
>
> Can I just use two diodes that will handle the current, or is there 
> something else I should do ~ additional parts, etc?
>
> Also, I would like to replace the 6H6 for the same reason, but what diodes 
> should I use?
>
> I know that these items are available but in the interest of saving money, 
> I would like to do it myself. . . .
>
> Comments?
>
> 73
>
> Gene, WØQFC
>
> www.w0qfc.com
>
> _______________________________________________
>