5AR4 rectifier tube question


I am sort of shopping for one or more 5AR4s for a Cary SLP05 power supply because I’d like to have at least one spare and because I’d maybe like to roll two or three ad see if I can hear an improvement or vice versa. I make no claims of knowing much about the vacuum tube game; occasionally I get lucky & stumble on something that really works for me. As far as the 5AR4, I did a hit at Uncle Kevin’s site, and there were some that looked interesting (I am thinking of one in particular, it had a Japanese sounding name that started with a ’M’) but when I click on it, all I get is a picture of Uncle Kevin’s screaming face telling me "not to buy tubes" (later, when I finally took time to read, apparently his tube tester is down).

So I started doing hits on Ebay, and oh my gosh! I was inundated with choices and the variation in prices! Which do I stay away from and which should I be interested in? Would a 5AR4 from Bugera also be suitable for what I’d want to use it for? Could a rectifier tube provide a big sonic upgrade if I spent enough money on it? Can I make a sonic upgrade from what I believe (I haven’t opened up the power supply yet) is the stock EH 5AR4 without breaking the bank? I would be totally good with the $50.00 range and picking up 2 or 3 different ones to play with if those with experience thought I could improve the power supply in that range. If I had to I guess I could go more (the $100.00 range) but I probably wouldn’t be buying too many of them, and I was kind of HOPING not to go much over that.

Anyway, thanks in advance for the input; I always consider it part of my education.

immatthewj

Showing 1 response by tomcy6

While you’re at ebay check out this link for an example of etched codes:

Mullard Blackburn GZ34 etched code

Top line right below the word Mullard - f32. f3 is the tube type and 2 is the change code, like a model number - v1, v2, etc.

The second line - B6D5. B is the Blackburn factory code. 6 is the year made, in this case 1966 (codes with three date digits are generally after 1962 or 3). D is the month, April, fourth letter of the alphabet fourth month of the year. 5 is the fifth week of April. They started adding the week code after 1962 or 3. That’s all there is to it.