Winter SB-230 Project!

[Allen Jones]

Since the 8560 is a tetrode you will need a regulated
screen and bias supply in addition to the plate
supply.  The 8560 is very much like the 4CX250B and
will probably give you 350W or so out. My SB-230 is
good for nearly 600W peak output with the original
8873.

Some SB-230's have been modified to use the
inexpensive surplus Russian GI7B triode.  Output is
comparable to the 8873.  This tube is air cooled so
some mechanical rework is required.  Here is a link
with info including photos:

http://www.gi7b.com/

73,

Allen, W9DZ

/--- Tom Wright <rescue_svc at MSN.COM> wrote:

> Hello all,
> 
> 
> 
> I have the case of an SB-230 arriving on Fed Ex on
> Thursday. This unit
> is minus the transformer and tube. Have heard of
> several people using
> different tubes in these and I bet there are a few
> lying around that
> have been given up on. I could sure use suggestions
> as to what to do
> here and maybe a good price on the transformer and
> tube ideas. I know
> some have used Svetlana 8560AS tube but I don't have
> any documentation
> on how this was done. Socket would need changed. I
> see three different
> sockets available for that tube and have no idea
> which one would be
> best to use at all.
> I'm open to suggestions on this one!
> 
> 73s from Tom
> KCØNSC



       
____________________________________________________________________________________
Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.
http://answers.yahoo.com/dir/?link=list&sid=396545469

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html