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Old 3rd June 2003, 08:23 AM   #31
arnoldc is offline arnoldc  Philippines
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hi saurav, i use an ALPS 100K pot for the volume control and does not use a preamp on my SRPP 2A3. i've tested it with good results on "non-efficient" speakers such as my Infinity Kappa 200 @ 89dB, JBL Ti2K @ 88dB, Red Rose Spirit @ 87dB as well as Axiom M3ti @ 92dB, Coincident Triumph Signature @ 94dB, Voigt TQWL pipes, and Bob Brines (licensed) Fostex TL speakers. I like it best with the Coincident Tri Sig though. I hope to be able to test with an Omega TS2 and Super 3 soon.

hi morse, my CX-345 arrived and will get it soon. i'd be able to give you some feedback when used on this SRPP circuit, but I don't have a 5K OPT other than the 125ESE (my 2A3 is currently using MagneQuest DS-025). i'd be making another amp specifically for the CX-345 with Tamura F-475 and this is where is will use the acrylic, cost permitting. yes, i've seen the shanlings as some friends have them, but i don't have the urge yet to splurge on a solid state player that expensive as i'm pretty happy with my Oracle turntable.
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Old 3rd June 2003, 03:37 PM   #32
Morse is offline Morse  United States
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Hi ArnoldC;

>>>...i've seen the shanlings as some friends have them, but i don't have the urge yet to splurge on a solid state player that expensive as i'm pretty happy with my Oracle turntable...<<<

Sorry, I didn't write that very clearly. I wasn't trying to imply that you should go from analog to digital (*shudder*) but just pointing out how much fun the avant-garde styling of something like that can be. Personally I loathe the current generation of soul-less black boxes that make up mainstream hifi, though at least their cosmetics correctly advertise the contents - as warm and individual in character as a tray of ice cubes.

By the way, what did you think of the 125ESE's? I'd like to put something serious but affordable on my next SET project for OPT's and the 125ESE is at the top of the current list of candidates.

>>>...i've tested it with good results on "non-efficient" speakers...<<<

Yep, total agreement with you there. You really don't need high SPL speakers with SET so long as the speaker's crossovers, if any, are 6dB/octave slope. Right now I'm doing the listen/fine tuning on a pair of 89dB SPL RS40-1354's and they've got way better dynamics and more bass response than I thought they would with only 4 watts from my 2A3. It's almost a shame to use 'em with an amp like the 6BM8 Gnat that's built for moderate listening levels with limited bass response. Just got to get rid of a little upper midrange "shoutiness" and they'll be perfect for a midsize little stereo like the 6BG6 SET that i've got on the drawing board.....

One other question if you don't mind - what did you think of the Axiom M3Ti's? I've got a buddy here who's looking for budget speakers for his midfi system and he's sheepish about DIY'ing it. The Axiom looks like a good candidate for him, along with a subwoofer.

All the best,
Morse
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Old 3rd June 2003, 04:19 PM   #33
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Quote:
hi saurav, i use an ALPS 100K pot for the volume control and does not use a preamp on my SRPP 2A3.
Well, it should be fine with a passive linestage then. The webpage says .7V input sensitivity for the cathode follower version, and I'm hoping that the SRPP version doesn't reduce the gain too much.
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Old 3rd June 2003, 11:51 PM   #34
arnoldc is offline arnoldc  Philippines
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Quote:
Originally posted by Morse
Sorry, I didn't write that very clearly. I wasn't trying to imply that you should go from analog to digital (*shudder*) but just
hi morse, no i'm sorry you wrote it perfectly but my writing does not end with a period... ha ha ha. it was altogether another thought

Quote:
By the way, what did you think of the 125ESE's? I'd like to put something serious but affordable on my next SET project for OPT's and the 125ESE is at the top of the current list of candidates.
this 125ESE continues to amaze our group. IME, i've found it no slouch, as it sounds really good on different circuits.

1. on my SRPP 2A3, everybody was amazed at how good it did 1812 Overture (the real thing, not the wimpy digital cannons). no distortion on the cannons and crystal clear on the bells. it's driving a modified Voigt.

2. on my 76-6SN7-300B amp, it also sounds very good. and reacts well with 300B tube rolling such as Valve Art, Electro Harmonix, TJ Mesh and WE300B.

3. a friend who has a Monica (Bob Danielak's direct coupled darling, DC Darling) has been using this for years. yesterday, he swapped in a Tamura F-475 and found out that the F-475 is more "refined" but that's it. i told him the F-475 is overkill for Monica

IMO, this OPT is a great workhorse, you won't be disappointed. and for the price you pay, it kick ***. he he he

Quote:
One other question if you don't mind - what did you think of the Axiom M3Ti's? I've got a buddy here who's looking for budget speakers for his midfi system and he's sheepish about DIY'ing it. The Axiom looks like a good candidate for him, along with a subwoofer.
i've auditioned them in my room, using my equipment and here's what i found using the 2A3.

pros:

- no crossover
- it did not cause the amp to clip
- it has clarity and resolution
- it conveys that magical midrange of SET
- it has smooth highs
- excellent soundstaging ang imaging

the bass, for an enclosure that small, is surprisingly good. it delivers punch and dynamics that are hard to ignore.

cons:

- it may not be 92dB as claimed by the manufacturer

it's worth the $275 list price.
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Old 4th June 2003, 02:00 AM   #35
Morse is offline Morse  United States
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Thanks ArnoldC!

That's just the info I needed before dropping the $$ on the 125ESE's.

>>>...1812 Overture (the real thing, not the wimpy digital cannons)...<<<

That wouldn't be the old Telarc recording, would it? I used to have that one on LP and used it to show off the biamped dual 15" subs I'd built back in the early '80's. That recording rocks!!! I had a heck of a time getting a turntable/cartridge combo that would track it though - IIRC I ended up with an NAD 5120 and a Radio Shack Shure knock off, and that did work.

By the way, you're into LP's, aren't you - where's a good place to buy LP's online these days? I've thought about getting back into that but my LP collection is long gone and would have to be built back from scratch. Still have the 5120 and a couple of pretty decent phono cartidge/styli combos, but I need to piece together a good RIAA preamp.....

I'll pass on that recommendation on the Axioms to my friend for his Yamaha sand amp (assuming I can't talk him into DIYing the speakers).

Thanks again and all the best!
Morse
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Old 4th June 2003, 02:30 AM   #36
arnoldc is offline arnoldc  Philippines
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hi morse,

yes, it's the old Telarc

on vinyls... i have a big disadvantage being in the Philippines. we have our own sources here, but some titles i'm looking for are kinda expensive or not available. from time to time, some people go to the US and haul a thousand or so vinyls and sell it here.

my friend buys at reasonable cost from ameoba records, but not online. i buy from other sources such as audiogon, then have it shipped to my friend in CA, then she ships it to the Philippines.

so which phono pre-amp have you been looking at? been using Musical Fidelity X-LP and i think it's time to do some tubes too. been looking at Hagerman Tech phono stage or JE Labs, he he.
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Old 4th June 2003, 03:44 AM   #37
Morse is offline Morse  United States
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Hi ArnoldC;

Thanks for the heads-up on Audiogon - I'd heard of 'em but never knew anyone who'd bought from there. I may have to give that a try after I visit the local second hand shop and see what their selection and price's are like.

Hmmm, which phonostage?

I was thinking of taking a circuit out of RC 30 with a 12AX7 and building a 'make do' power supply consisting of a pair of 12.6V 3A trafos back to back (and drawing the .3A heater current off the junction of the two). I'll take a look at the JE Labs circuit and see if it's anything that's do-able on my budget these days. OTOH I do have some oddball valves around here - 6AK6's, 6021, nuvistors and such that might have potential.

In the longer term, once I find a circuit I really like, I might integrate it into my JE Labs 2A3 - my PS has almost 100% overdesign on the secondary winding so there's current to spare in there, and an oversize chassis to work with. Then I'd have to add another pair of RCA jacks and a switch but that's no big.

What do you think about all this? I don't know much about valve based phonostages.

Thanks again for the info!
All the best,
Morse
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Old 4th June 2003, 07:42 AM   #38
arnoldc is offline arnoldc  Philippines
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hi morse, unfortunately, i have no experience myself with tube phono stages... we have to rely on someone else
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