Click title to read one, or click date to read all below it.
05-18-08
I didn't look for the thread for a while and i was saddly su ... Pablovila
05-18-08
Pjwd, do you know if the rk50 pot can be somehow adapted for ... Markxiii
05-19-08
Markxiii the spindle does not go through to the back so the ... Pjwd
06-11-08
I originally posted this as a separate thread but am re-post ... Ait
06-11-08
Very interesting. now that supratek is defunct, i wondered h ... Kgturner
06-11-08
I understand, kg. even though i thoroughly studied the circu ... Ait
06-12-08
Hi gang. hey...kudos to ait for his post on the 7193 conver ... Ecclectique
06-12-08
Just to clarify, no holes need to be drilled in the preamp! ... Ait
06-12-08
I just finished an extended listening session, and a few thi ... Ait
06-12-08
Does anyone have kevin covi's most recent contact info. his ... Powers
06-15-08
Hello, first of, thanks ait for sharing your findings. i a ... Amandarae
06-16-08
The anode of the first 6sn7 triode stage is connected to the ... Ait
06-16-08
Okay thanks! so it means that the triode in the 6sn7's are ... Amandarae
06-16-08
Ok, phono section tubes: 6688 (e180f - philips sq) 6922 (sto ... Ait
06-16-08
Thanks ait. yes, our chenin are different from each other t ... Amandarae
06-18-08
National union vs rca vs ken-rad 7193 tubes. since i have ... Ait
07-23-08
I've been listening to the ken-rad 7193s in my chenin for ab ... Ait
07-26-08
I just received most of the parts to do the 7193 conversion ... Slowhand
07-29-08
Has anyone compared any of the supratek preamp model against ... Tuongsy
07-29-08
Picked up a pair of nos tung-sol 5881 (6l6wgb) tubes for $25 ... Ait
08-04-08
There's a pair of piano black/chrome malbecs on ebay for $35 ... Kgturner
08-10-08
Easy tweak for preamp! - i have been playing with diy activ ... Pjwd
09-03-08
Anyone had problems with the select 1 remote & aquired a rep ... Simon74
09-03-08
Shoot mick an email. i'm sure he can point you to a source f ... Kgturner
09-04-08
Mine died a couple of years ago, and mick got me a replaceme ... Outlier
09-05-08
Thank guys will mail mick. simon Simon74
09-19-08
To keep the dream alive, some further supratek comments and ... Stevem1960
09-24-08
That last post sounds like a troll, please ignore it!! i h ... Stevem1960
09-24-08
I've seen the internals of my chardonnay, malbecs, and curre ... Kgturner
09-25-08
Mint604, i have owned a supratek preamp for years with no t ... Slowhand
10-11-08
Slowhand, how is the 7193 conversion? Powers
10-12-08
I'm curious, too. do we have someone besides me running thes ... Ait
10-13-08
Mr ait, yes ,here from distant são paulo ( brazil), thanks t ... Amfortas
10-14-08
The tubes i'm using are also from 1942 and 1943 - world war ... Ait
11-03-08
Eh, i'm hoping the troll bit didn't refer to me? mick pointe ... Simon74
11-04-08
Simon: you might consider buying a cheapie learning remote ... Kgturner
11-06-08
Hi kg, thanks for your offer :-) i'm actually in the uk. i ... Simon74
11-08-08
Hi guys, don't know if anyone is keeping up with the thread ... Slowhand
11-09-08: Amandarae
IMHO,
When the usual hit or miss tube swapping troubleshooting technique fails, you have to have a freq generator and a scope to solve problems like this. This is not just a matter of what "looks" broken anymore.
Your tech friend, how did he come up with the decision of replacing the resistor first?
Tell him to isolate the PSU circuit to the actual amplifier circuit. By feeeding very low freq signal at the input, you can tell if the power supply is the one with a problem looking at the modulation, if any, of the B+ signal. At mid to higher frequencies, you could test the real amp section stages by stages, assuming that the usual downstream B+ voltages checks out as it decrease when being decoupled from the stages, and see where the noise is coming from.
Please ask your tech about those. If he does not understand what you are talking about, find a different tech. It would be helpful also to plot the schematic first before poking around with the scope so that you can easily follow which point checks out in relation to the diagram.
Hope it helps......
Amandarae (System | Threads | Answers | This Thread)
11-09-08
Addendum my post above assumes that you already tried swapp ... Amandarae
11-09-08
You may want to contact michael samra at audio asylum. he d ... Jeffjazz
11-09-08
For what it's worth, when i first received the malbecs, one ... Kgturner
11-10-08
Thanks guys, i got the cortese back last night and it seems ... Slowhand
02-07-09
Any happenings in the world of supratek owners? anybody move ... Kgturner
02-08-09
Hello kgturner, me. i have not use my chenin for almost 8 ... Amandarae
02-08-09
I'm preparing to do some more mods to my chenin. as you know ... Ait
02-08-09
I'm not making any moves. i'm raher expectantly waiting for ... Maril555
02-09-09
That's interesting, somebody asking- what's new with suprate ... Maril555
02-09-09
Maril555, i am sorry you had a bad experience with supratek. ... Waltersalas
02-09-09
Well, i do believe mick was more attentive to his customers ... Maril555
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