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: Ait
National Union vs RCA vs Ken-Rad 7193 tubes.
Since I have converted my Chenin to 7193s, I have been evaluating the different brands of 7193s available (in addition to enjoying the great sound!). Let me say that they are all excellent tubes, but there are some subtle differences between them, both in sound and in construction. All have black, relatively flat plates, with small boxes in the center.
National Union: The NUs have the smallest bottle of the three 7193s, and the getter is not visible from the exterior of the tubes. They have a round top and bottom mica. These were the first 7193s I ever heard, and they sound very good indeed. These are silky smooth, with a rich midrange. They are a little rolled off on the extremes compared to the other two tubes, but it is a not a huge difference.
RCA: The RCAs have a larger bottle than the NUs, with a bottom getter and round top and bottom mica. They have more extended highs and lows than the NUs, with fuller bass and a little more detail on top. Not quite as smooth as the NUs, and not quite as warm in the midrange.
Ken-Rad: The biggest bottle of the three, slightly larger than the RCA, with bottom getter and non-round top and bottom mica (looks like a round mica with a section cut out in each quadrant). The best bass of the three - the impact of kick drums is sensational, and bass lines can be felt and heard in great detail. The highs are nice and airy, with very good detail, and the midrange is very sweet as well.
So overall, in my opinion, I would rank the 7193s as follows:
Ken-Rad: best overall - it has everything
National Union: smoothest and warmest sounding, but a little less top and bottom than the others
RCA: Similar to the Ken-Rad, but not quite as smooth in the highs.
Ait (Reviews | Threads | Answers | This Thread)
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
Imho, when the usual hit or miss tube swapping troubleshoot ... Amandarae
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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