6L6GC or other 6L6 Types in a 45/100?

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VintageCharlie
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6L6GC or other 6L6 Types in a 45/100?

Post by VintageCharlie » Thu Mar 18, 2010 4:30 pm

Dear forum members,

i couldn't find the answer in existing threads. I'm about to build a 45/100 and i was wondering if it could also take any 6L6 type tubes. The Marstran power transformer that i'm going to buy for this has also the 490v tap, which i think i'm going to use, rather than the 560v. Could some 6L6 tubes be suited - would they take the voltages? Specifically i'm interested in the winged =C= 6L6GC, as i liked those tubes very much in my jtm-45 clone.
I'd go with KT66's, but matched quads are expensive and i can get the =C= tubes cheaply where i live.

Are there some good current production KT66's made in Russia?

Thanks in advance!

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Re: 6L6GC or other 6L6 Types in a 45/100?

Post by Flames1950 » Thu Mar 18, 2010 5:37 pm

For Russian KT66's, I've been quite happy with the set of "Tung-Sol" KT66's that have been in my Super PA. I thought they sounded really nice, and I just changed them out last night -- they'd been in there running at 530VDC on the plates since August 2006. Far more life than I've gotten out of many tubes, and I really only changed them because of how long they'd been in there. I'll keep them as backups.
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Re: 6L6GC or other 6L6 Types in a 45/100?

Post by Kevin » Thu Mar 18, 2010 6:04 pm

I tried a quad of Winged =C= 6L6GCs in my Black Flag for a bit. It was running in the 490s. They're a tough tube and sound good in those circuits.

I had to lower my bias feed resistor to get them in the zone, bias wise, as they drew a lot of current. I also like to lower the bias splitters (220k down to 100k) to roll off some bass and avoid woofiness.

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Re: 6L6GC or other 6L6 Types in a 45/100?

Post by VintageCharlie » Thu Mar 18, 2010 6:34 pm

Thanks for the replies guys!

Aren't the Tung Sol KT66 actually 6L6's in a different disguise? Or was it a different tube that was actually a 6L6 that looks like a KT66?

I wonder if the 45/100 OT would handle 6L6Gc's also that easily?

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Re: 6L6GC or other 6L6 Types in a 45/100?

Post by Roe » Fri Mar 19, 2010 6:55 am

6L6GCs should work fine as should 7581s. 6l6s are nice for that EJ dirty rhytm sound. tung sol 6l6 STRs sounded good in my 67 100w running at 490v
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Re: 6L6GC or other 6L6 Types in a 45/100?

Post by FenderBndr » Thu May 06, 2010 3:46 pm

Dont know about the 45/100Here is a clip of my 1965 JTM50 super pa running 6L6's. Spekers are a Goodmans audiom 12p-d 50watt and 1978 celestion 20watt g12s



http://www.youtube.com/watch?v=Ajusi05LDYA" onclick="window.open(this.href);return false;

And with just the Audiom wired -

http://www.youtube.com/watch?v=ur2CziGNVF8" onclick="window.open(this.href);return false;

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