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Old 6th February 2013, 08:04 PM   #11
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my SSE is very similar, but i used an xpwr035-120 pt and a 560 ohm cathode resistor and it red-plated the Shuguang 6L6gc (coke bottle shaped) tubes I tried. I didnt try to raise the cathode resistance, since it works fine with JJ el34s and I just left them in there. I did get a chance to test the tubes on a 600V hammond pt and they worked fine with the lower b+ of around 400V.

These are the only 6l6gc tubes I have tried, so I'm not sure if I just have a worse than average batch, but it didn't seem like they could be pushed very hard. I'm relatively novice too, so don't put too much weight on my experience...
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Old 6th February 2013, 11:49 PM   #12
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Your experience with the Shuguang 6L6s mirror that of many. They do not handle the higher spec-bending plate voltages that most other 6L6GCs can.
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Old 7th February 2013, 09:58 AM   #13
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I'm curious what you guys are using for coupling caps
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Old 7th February 2013, 02:11 PM   #14
rknize is offline rknize  United States
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I believe I have Auricaps in mine. I've also had those Russian PIOs in it.
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Old 7th February 2013, 02:13 PM   #15
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Quote:
Originally Posted by the trooper View Post
I'm curious what you guys are using for coupling caps
Wima MKP. I wouldn't get too hung up on this, as any decent film cap will do the job. IMHO, boutique cap funds are better spent on transformers. Other good choices that are reasonable $$ are Russian surplus film caps that are easy to find on Ebay or Auricaps.
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Old 8th February 2013, 12:08 AM   #16
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Wima MKP. I wouldn't get too hung up on this, as any decent film cap will do the job. IMHO, boutique cap funds are better spent on transformers. Other good choices that are reasonable $$ are Russian surplus film caps that are easy to find on Ebay or Auricaps.
+1 for sure on iron coin. You could try some Orange drop 716P caps there, not too spendy and they sound pretty good. I use them in my 6L6 SEUL and they sound mighty fine.

Note: 716P not the 715P - no experience with 715P for coupling caps

I get a little picky with what I use for coupling caps, next up for me is K40Y-9 with Auricaps on the bench (only cause I have em). 716P are dead quiet, for a few bucks they are pretty decent coupling caps.

When it gets down to cap selection it all depends on the rest of your system. If your preamp and speakers are up to snuff then you MAY be able to hear differences..that and your ears. I'm an all analog type - TT -> tube pre -> tube amp. I like a quiet background and neutral sound = what goes in I want it to sound the same on the output (or VERY close). Most all of the music I listen to is created with tube amps so the tube coloration is already there, I don't want to ADD to it. Coupling caps can add coloration IMHO so neutral is what I like/want. YMMV

Cheers,
Bob
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Old 8th February 2013, 12:47 AM   #17
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Those Russian pio caps are pretty cheap and I used them once before with good results. Building the chassis is favorite part I must admit though.
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Old 8th February 2013, 07:54 AM   #18
rknize is offline rknize  United States
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The most boutique cap I have used in the Auricap. However, I got these about 12 years ago when they first came out. I think the price has gone up quite a bit since then. The 716P are a great choice too.
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Old 12th February 2013, 12:25 AM   #19
rock12 is offline rock12  United States
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Sorry to jump in on your thead but we seem to be in about the same place. started soldering, I am going to use a switch to vary my bias so I can tube role. my edcors xpwr035 and cxse25-8-25 also there 10h choke should arrive fri. Thinking of using the CSS 7.3 speakers
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Old 12th February 2013, 01:23 AM   #20
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Your not intruding in the least bit. A bias switch sounds pretty useful but is above my skill lvl to make, unless I had diagram slap me in the face. I briefly thought about rolling rectifier tubes to change bias, which I have not researched yet. I actually made DIY speakers, the design is called the Lyra, 3 ways. No idea what the sensitivity is on them. Guessing around 90. They turned out very nice.

Last edited by the trooper; 12th February 2013 at 01:24 AM. Reason: Bad grammar
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