Hello and a question

2nd harmonics for the masses

Hello and a question

Postby apurcell22 » Tue Apr 13, 2010 1:28 pm

Hello all,
New to the forum and wanted to say hey. I also have a question. Would these chokes work ok for the GSG? I have a couple left over from another project and would like to use them if they will work.

http://www.radiodaze.com/RD-transformer01.htm

bottom of page RCD-100 choke

Thanks in advance,
Al
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Postby Geek » Tue Apr 13, 2010 5:01 pm

Thanks for the link!

I'mma get a box for ST-70's (one choke per channel).

Cheers!
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
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Postby apurcell22 » Tue Apr 13, 2010 8:25 pm

Welcome. Cant beat the price.
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Postby Shannon Parks » Wed Apr 14, 2010 5:44 am

I'm looking through the manual and I notice I haven't spec'd the choke for this design. The choke is meant to be the ubiquitous Dyna C354, rated at 1.5H, 200mA DC and 55 ohms DCR. So I intend a voltage drop from this DCR and R17a & R17b (90 ohms): ~145 ohms total. This is meant to get the B+ around the max spec of 325V for the 6B4Gs (later datasheets). Obviously, a new Sovtek can handle a much higher B+. So if subbing with this choke, I would jumper R17a and leave R17b empty. It may be a tiny bit maxed out, but the average DC currents will be in spec.

Shannon
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Postby apurcell22 » Wed Apr 14, 2010 9:59 am

Thanks Shannon. So do I need to parallel them? They have a max current of 125mA.
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Postby Shannon Parks » Sat Apr 17, 2010 6:05 am

While it is pushing it, your average current should be within this spec with a single choke. Give it a try.
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Postby apurcell22 » Sat Apr 17, 2010 8:11 am

Thanks for the reply!
Al
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