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Post by MartinT on Oct 30, 2014 15:56:55 GMT
I do agree Ali, I was trying to put right an apparent slur on those in here who DO know a thing or two. Returning to dismissive mode...  |
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Post by pre65 on Oct 30, 2014 18:28:35 GMT
I have a push pull amp (home built) using a pair of double tetrodes, the 832a.
On this valve the cathode is common to both halves (of each valve) and on my version instead of a cathode resistor I have a CCS (constant current source).
I am reliably informed that working in this configuration the amp can ONLY work in class A. Output would probably be about 4-5 watts per channel.
It is a shame when self confessed experts make statements that are best misleading, or just plain incorrect. 
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Post by Eduardo Wobblechops on Oct 30, 2014 19:00:48 GMT
I do agree Ali, I was trying to put right an apparent slur on those in here who DO know a thing or two. Returning to dismissive mode... Sometimes it's hard to turn the other cheek... |
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Post by Deleted on Nov 5, 2014 22:04:24 GMT
The rare 1960's Trio 'Supreme 1' multi channel amp. Mega expensive back then.. Only ever seen one on auction that had my name written all over it till i noticed the damage to the facia that i could never have lived with
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Post by ChrisB on Nov 5, 2014 22:06:28 GMT
You should have said, I expect I could have lived with it!
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Post by MartinT on Nov 6, 2014 6:48:30 GMT
Ooh yeah, that's a nice beast. |
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Post by Eduardo Wobblechops on Nov 6, 2014 8:49:24 GMT
Not that it's particularly rare, but I recently acquired a first gen Alchemist Kraken. Lovely little amp, and yes, it's Class A! :-)
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Post by Deleted on Nov 6, 2014 13:13:42 GMT
Not that it's particularly rare, but I recently acquired a first gen Alchemist Kraken. Lovely little amp, and yes, it's Class A! :-) No it isn't! First 2 Watts maybe.... |
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Post by Eduardo Wobblechops on Nov 6, 2014 13:58:16 GMT
That's all I need. :-)
Runs the mid and top in my active speakers (approx 94db/w/m) - from 200Hz up, so I doubt it ever uses more than a couple of watts.
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Post by Deleted on Nov 6, 2014 14:42:31 GMT
Ooh yeah, that's a nice beast.
Hi Martin No not that one. This one  |
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Post by MartinT on Nov 6, 2014 14:49:08 GMT
Do you know, I linked to the same pic as you and it broke this morning so I re-made it and it ended up being a different model!! I'll delete mine.
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Post by julesd68 on Nov 18, 2014 19:52:14 GMT
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Post by MartinT on Nov 18, 2014 20:08:52 GMT
Wow, you don't see one come up very often. Much as the preamp is excellent, I'll not be parting with $10k for one. It's the power amps that are incredibly rare too, and very, very good from what I remember.
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Post by ChrisB on Nov 19, 2014 7:35:14 GMT
Just for a day or two, I'd love to get my hands on a pair of ESS AMT-6 Professional speakers (and the necessary bigger room!) - 2 x 12" woofers and 4 x air motion transformer tweeters.  |
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Post by MartinT on Nov 19, 2014 10:42:11 GMT
Yes, but...
they look like a pair of JBL 250Ti in the background. Lust!
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Post by ChrisB on Dec 16, 2014 8:00:02 GMT
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Post by MartinT on Dec 16, 2014 22:13:23 GMT
That arm is so highly engineered that it's the first linear tracker to make me really want one!
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Post by ChrisB on Dec 16, 2014 22:31:30 GMT
Chunky beast, eh?! .JPG) The tt has an interesting (early?) inverted bearing which is just below the platter - the lower one in this diagram.  |
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Post by ChrisB on Dec 20, 2014 11:32:38 GMT
Acoustic Research / Rowan AR MGC-1These super rare beasties rather appeal to my sensibilities and I lusted after them in the 1980s.  So, as you can imagine, I was rather excited this morning to find a pair of them on Ebay for sale in the Midlands. Sadly though, in addition to the expected refoam job, they're also missing several key parts - namely the foam (not such a big problem) but, more importantly, the controller box which allows you to dial in the output level of the side drivers. This is the thing that would have made them usable in the weirdly asymmetrical layout of my room. They would have made a rather fantastic Christmas present to myself!
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Post by Deleted on Dec 20, 2014 13:14:01 GMT
Acoustic Research / Rowan AR MGC-1These super rare beasties rather appeal to my sensibilities and I lusted after them in the 1980s. So, as you can imagine, I was rather excited this morning to find a pair of them on Ebay for sale in the Midlands. Sadly though, in addition to the expected refoam job, they're also missing several key parts - namely the foam (not such a big problem) but, more importantly, the controller box which allows you to dial in the output level of the side drivers. This is the thing that would have made them usable in the weirdly asymmetrical layout of my room. They would have made a rather fantastic Christmas present to myself! Surely you could make a replacement controller box? |
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