Hello Doc, You were right, swapping EL-34 to KT-90 is not a simple tube rolling, It can be done but with a lower output. For the fully monty alls power caps...
Hello: Anyone in this group familiar with older, Ampex monoblocs using 6550 output tubes? These may not have originally been for home use, but for a theater or...
... Partial nudity is evidence of civilization! ... Not quite. I have heard over-built amps using a boat-load of trans, that do not have any distinctive...
... Hats off to the folks at AUDION. That is very good service indeed. I used to own a Stirling (when it first came out). I think adding a preamp will far...
I have seen these in a shop here. Judging by the looks they are theater amps that are a bit later than my 807 monoblocks (which sound mellifluous but then 807...
... Superbowl halftime show may have been civil ;) I slept thru it ... ... 45 I do not find much in the new "PX25". So, you like the mesh 300B from FM? I love...
As most people know, I am not at all a commercial cable freak (quite the contrary) and look warily at many mega-effort DIY cables. But sometimes I do a little...
If you are talking about these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3074662105&category=50593 Holy! Too big for most places! These are several...
hi Doc, Am not sure about how you did the Cat 5 IC. There are a fe twisted pair inside. Did you use one twisted pair as +, and the other one as -, or in each...
____________________________ Did you tried the KenRad 2A3? They sound good and are still not as expensive as the RCA NOS. If positive, what is the difference...
Hi Doc, As long as we are passing along DIY cable secrets, my favorite DIY interconnect (preamp to power amp or CD player to preamp) is based on Andrews...
Hi, ... Otherwise known to the cognescenti as "JPS Labs" Cables. Tried Heliax (the version with airspaced, not foamed dielectric), the simple "Silver Zero" and...
Hi, ... I have been "preaching" the virtues of Cat 5 as "next to nthing cost" cable for a while. I also don't really recommend braiding (read again my article...
Hi T, I'm sure you've written about these before, but I must have missed past references to "Silver Zero" and "V-I" cables. Care to pass along the links so I...
Hi, ... V-I was written about (not sure where specifically, probably AA) is the "Vergeltungswaffe". The "Zero is just two thin solid silver wires (uncoated) in...
... Yes, this way as it is the simplest and least easy to make a mistake. I want to emphasize that that was not at all a studied method. Eqaully simple and I...
I have used CAT 5 cable as speaker cable for over two years and it always has sounded very good to me. It may be a bit of over kill but I used one ten foot CAT...
I also used Cat-5 but notice that strange noise for about 2 seconds then my cell phone would ring. Even when I talked noise would come thru. I then tried with...
_________________________________ It must be 1989-90. I was still leading a bohemian life- living in slump-py loft on the verge of Manhattan, working Tuesday,...
Hi All I usually just mess around with Transistors and Chips.I sold my Marshall amp (tubes) a few years back.I've built Preamps using op amps and they work as...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the doctorjohn_CheapTubeAudio group. File...
doctorjohn_CheapTubeA...
Feb 8, 2004 12:34 pm
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The attachment didn't take. so see the schematic in the files section" "Champ out of Junk Parts"...
Hi, I have just bought a pair of fostex ft17h for my 19. Could someone advise me which is the best way to connect to 19. It would be great if someone could...
since no one gives you any hint, let me put in my 2 cents. the schematic specifies a centre tapped transformer hence no need for a bridge rectifier. make sure...
If I get a 300v center tapped transformer. I can't find one with the 6.3v tap included. I will need a 6.3v transformer for the heaters .......Right. I don't...
You can buy 6.3V power transformers as stand alone units. Pins 4 and 5 are joined for one end of filament circuit. Pin 9 is the other end, for 6.3V. If using...
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