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Old 7th February 2008, 09:04 AM   #2001
steenoe is offline steenoe  Denmark
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Quote:
Originally posted by wirewiggler
Put them in a pair of these:
I have to admit these are the best sounding amps I have built. The sound stage on these are phenomenal. My Aleph30 goes into the closet with my 300b set amps, and a pair of KT88 amps.
Nice job Great looking amp. So you like the F4 too?

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Old 7th February 2008, 03:48 PM   #2002
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Quote:
Originally posted by wirewiggler
Put them in a pair of these:
I have to admit these are the best sounding amps I have built. The sound stage on these are phenomenal. My Aleph30 goes into the closet with my 300b set amps, and a pair of KT88 amps.

Yeah, that really is pretty.

I have to agree, too, the F4 is the best sounding amp I've fabricated.
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Old 7th February 2008, 05:17 PM   #2003
SCD is offline SCD  Canada
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Default Set+ F4

In one of the 6moon articles reviewing the F4 the fellow describes his adventures with hooking a 45SET output up to the F4. He then goes into great details about the splendors and wonders of the arrangement. This sounds quite intreguing to me.

Mr wire wiggler you have an opportunity to try a pretty cool experiment.
Check out the review in 6 moons and the discussion in the F4 manual. There may be something quite interesting there for you to try. How about a report back on the out come.
The guy at 6moons got a little over the top creamy and gooy in his descriptions for me. His over use of adverbs and adjectives is quite distracting. But I take he liked what he heard.

Anyone else tried this yet with other flea power SET
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Old 7th February 2008, 06:09 PM   #2004
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I'll be trying the F4 with a tube differential gain-stage soon: Choky is coming up with a layout for us to experiment with.

It'll be interesting to see how it sounds compared to Nelson's wonderful sounding JfetBOZ--which I've morphed into a balanced, CCSed, choke loaded affair. Talk about sweet and creamy!
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Old 9th February 2008, 11:14 PM   #2005
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Default F4 with SET

I may some day , my sets use AC on the heaters and have a bit of a hum. The F4 is so quite it will be hard to do. I just built a Twisted pair Balsie Balanced to single end converter and have been enjoying the KT88 amp on my Xbosoz preamp. It is a significant improvement over the tube pre I was using. Need to make new shelving so I can play with all my toys. In the mean time I am building Pumpkin for mate with F4, I hope this combo will satisfy me enough so I can focus on other projects. I just ordered Promitheus's Pearl MC pre and will need to upgrade Analog side.
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Old 9th February 2008, 11:24 PM   #2006
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...ahhh, somebody's been very busy!
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Old 10th February 2008, 08:11 PM   #2007
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Quote:
Originally posted by carpenter
...Nelson's wonderful sounding JfetBOZ--which I've morphed into a balanced, CCSed...
Hi Carpenter,
Talking about Nelson's wonderful sounding JfetBOZ do you mean schematic below?
What do you mean "CCSed"?

Best Regrads, Andrzej
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Old 10th February 2008, 08:55 PM   #2008
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Quote:
Originally posted by Andrzej Sochon


Hi Carpenter,
Talking about Nelson's wonderful sounding JfetBOZ do you mean schematic below?
What do you mean "CCSed"?

Best Regrads, Andrzej

That looks like the original circuit--it's single-ended.

I've created a thread entitled: JfetBOZ mods. There you see my amateurish attempts at improving/playing with Nelson's creation.
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Old 11th February 2008, 11:16 AM   #2009
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Thank you, Carpenter, I will look at your thread entitled: JfetBOZ mods.
a.
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Old 12th February 2008, 09:33 AM   #2010
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Default Re: Extra rail caps for F4

Hello,
I am back to the original NP schematics without any extra rail caps at the input. I found the sound was to sandy, grainy... so I pulled out additional caps on input. Sound is more clean now, acoustic scene still perfect, listening is very nice, but I have some troubles with loud pieces of many instruments and voices.
I will try to use better quality C1/C2 caps, like Nichicon bipolars.
What do you recommend regarding C3/C4, Nichicon ?
andrzej
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