Rick J B

Stella, RASS and Rush.

One should protect their hearing when young, because once damaged.....

She handles Rush pretty well too. This would actually be pretty good with a better source and a sub to go with the little SB-1's.

Beeker, what about so called "self biasing" amps? My Decware amp is supposed to be set up that way.

Very cool, thanks Fjd. 6922 or equivalent it is.

I got a wild hair this afternoon and decided to let this old girl sing a bit. I've only had this a few weeks and other than simply powering it up and listening to the radio for 5 minutes I hadn't really done anything with it yet. My plan is to turn Paul loose with it as his schedule allows and get her in ship shape. But I wanted to see what it would sound like with a digital input. So I hooked it up to the little SB-1's and a cheap DVD player and have been enjoying some Steely Dan and Pink Floyd here in the office. Its just sitting on a milk crate in the corner the wife calls the bone yard. But no matter, it sounds good.

You know that is a 12at7 tube right? Say what? Steve told me it was a 6922, which is what all the other tubes have been that I've tried in this spot. Or at least the day I picked this amp up in 03 it had the tube in question in it and it also came with the JAN Phillips 6922. He said I could try either to see which I liked best. Is it possible this amp could use both? I mean apparently it is because I've used both in that front end spot for long periods of time. I suppose you could apply the high voltage to the tube plates without the heaters; however, while it would survive for a while, it seems that prolonged use this way would ultimately damage the tube. There is no concern about applying high voltage to the tubes with no heater voltage. Why not give Deckert a call and find out what he is using pin 9 for in the amp? Maynard Yep, I need to touch base for sure. Tho it must not be an issue because the last 4 tubes I've rolled through that location over the past 3 or so years have been 6922's and its sounded nice, especially with the older tubes.

Yeah, unless you're wanting to go deaf you should be able to rock the Casaba with 8 watts through most Klipsch speakers. My RF-82 II's will play louder than I need with 2 watts. You would be amazed if you heard some of the demos that I periodically do with CWs and a 1/3 wpc SET!!! No one believes me when I tell them what the maximum power is! Maynard Those need at least 7000 watts, right?

Thanks for the input Fjd. I obviously need to email Steve, I'm confused on this.

Sounds about right. Look at the code on the tube - it will read something like "f32 B2C4". Probably around '62-'66. Sadly while much of the print on this tube is still in good shape, some of it has rubbed off. The only things that are clear are: GZ34/5 EICO by Mullard. Made in Great Britain. ......212. Look more closely where the glass meets the base - there is an acid-etched code on the glass. This doesn't rub off. Would be shocked if it isn't there. AN, here are some photos of the EICO tube. Thats all the info visible on it I'm afraid. Could it be that since it was produced specifically for EICO they left off the etching?

You know that is a 12at7 tube right? Say what? Steve told me it was a 6922, which is what all the other tubes have been that I've tried in this spot. Or at least the day I picked this amp up in 03 it had the tube in question in it and it also came with the JAN Phillips 6922. He said I could try either to see which I liked best. Is it possible this amp could use both? I mean apparently it is because I've used both in that front end spot for long periods of time.

Yeah, unless you're wanting to go deaf you should be able to rock the Casaba with 8 watts through most Klipsch speakers. My RF-82 II's will play louder than I need with 2 watts.

That's a 1983 Mullard made in the Mitchum factory. If it's anything like the CV4004 (12AX7) and CV4003 (12AU7) of the same era it's a nice tube. The CV4004 and 4003s are quite expensive these days - and BTW sound really good in the front end of VRDs. Thank you, sir. I thought I remembered being told when I picked up the amp it was a NOS tube, but couldn't remember what it was.

Sounds about right. Look at the code on the tube - it will read something like "f32 B2C4". Probably around '62-'66. Sadly while much of the print on this tube is still in good shape, some of it has rubbed off. The only things that are clear are: GZ34/5 EICO by Mullard. Made in Great Britain. ......212. Look more closely where the glass meets the base - there is an acid-etched code on the glass. This doesn't rub off. Would be shocked if it isn't there. Nah, nothing.

Another tube I have that I wonder about is the 6922 tube that came in my SE84C-S amp. It bears no makers name, but has the following info printed on it: 000-4024 CV4024 KQDD/K 83-31 . 654 R3C4 Other than having short gray plates and a halo getter, thats all I can tell on it.

Sounds about right. Look at the code on the tube - it will read something like "f32 B2C4". Probably around '62-'66. Sadly while much of the print on this tube is still in good shape, some of it has rubbed off. The only things that are clear are: GZ34/5 EICO by Mullard. Made in Great Britain. ......212.

A1's run down, especially his choice of rectifier, jogged my memory and I remembered I had a used GZ34/5 tube stashed. It was made for EICO by Mullard I'm guessing early to mid 60's?

A1, which iteration or vintage are your Tesla's? I've read that some of the CBS tubes were awesome, were those produced by Amprex?

That's the reason I like them. It took me a little while to get used to a little less bottom (in my case vs. an '80's US made JAN Philips, which is a much different tube), but what I came to understand was that the bass is more natural with the earlier Philips stuff.....and the mids and highs are really good - what I have tube gear for. The presence of the mids can affect your perception of the bass, as well as speaker positioning which can affect bass response too. Once you get used to the finer characteristics of the 50's to 60's era Philips and other similar vintages it can turn you into a picky SOB. There's a reason people pony up the $$$ for these. Great observations, and some I've experienced myself. The US made JAN 6922 tube (don't know when made) at the front of my amp was far better than any of the new make tubes I tried in that spot. In fact it took a Sylvania short black plate of 50's vintage to improve on the Army / Navy tube. For the money I've decided the milspec tubes are a decent buy, at least for now as their prices too are rising. Right now in my preamp I have 50's vintage Raytheon and Sylvania 12AX7 and 12AU7's respectively. In the DAC I now have Siemans ECC83's and its the best sound I've had thus far. Bass is tighter, highs are not raspy or shrill and the midrange is lush and warm. I can listen to this setup all day with no ear fatigue. Classical, Jazz or Rock/Pop, doesn't matter, all quite nice.

Is your wiring heavy enough for use with 20 amp breakers?

This is what I use on my records that've been impregnated with skin oil and household grit and dust over the years. It also removes residual mold wax from poor record pressing processes. It works amazingly well--even better than the record cleaning machines that I've tried. Thats all D4 is.

Its a celebration b!#(#%&!

Is that an 8-track deck?

Um, why does everyone post photos sideways or upside down???

Some poor bastage bought too many speakers.