[Amps] One more dumb question...

KB0NLY kb0nly at mchsi.com
Sun Feb 15 01:15:16 PST 2009


Maybe its because its late at night and my brain isn't working...

Looking at this schematic for converting an SB-200 to a two band amp using the GI-7B for 2m and 6m.

http://www.nd2x.net/yu1aw/1xGI7B-6n2-skem.gif

Ok bottom right, the bias circuitry, it shows a connection point for -Va.  Some designs show this connection and some don't, which leads to the confusion of where does this actually connect to, or to be more specific if converting a SB-200 using this design and adding a filament transformer for the GI-7B where is the best place to make this -Va connection?

Another thing, sadly i saw the posts of Tony's passing.  Will someone continue the production of the Bias board?  Looks like a really good solution to build into this conversion.

You will have to forgive the dumb questions, first time working on a conversion of this type, i have rebuilt and repaired HF amps before, but nothing of this nature.  Should be fun though!!

73,

Scott, KBØNLY



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