7591 Tube Equivalent, the correct height limitation makes JJ 7591s is about the same size as the JJ GZ34 / 5AR4 and JJ 6V6. It is a classic case of cut and paste amp design. 7591 comes in octal base, The JJ 7591 are significantly lower in anode current (max power output) than a NOS 7591 tube and will not be suitable for some Looking for a reliable 7591 tube equivalent? The Tung-Sol 7591A matches original specifications closely, offering superior sonics and stability essential for restoring vintage Hi-Fi amplifiers accurately. The charts Looking for a reliable 7591 tube equivalent? The Tung-Sol 7591A matches original specifications closely, offering superior sonics and stability essential for restoring vintage Hi-Fi amplifiers accurately. I needed to replace some 7591A vacuum tubes in two Eico amplifiers: the ST-70a and the ST-40. This power Question: I am using a military TV-7/U tester. : 6. New & NOS power tubes from Electro-Harmonix, JJ & other various brands. The best 7591 alternative is no alternative: use original (N. Double checked in my 1964 SAMS Tube Substitution Handbook and the only sub mentioned there was a 7591A for a 7591 (and Tube Substitutions for: 7591 Beam Power Amplifier Type 7591 Beam Power Amplifier MECHANICAL DATA As you know, 7591 tubes were popular output tubes for McIntosh MC225, MA230, and other famous amp brands such as Eico and Fisher. The problem is that they are now very scarce and expensive. They fit in different sockets so they cannot be interchanged. Either would require Just a heads up new Tung Sol 7591 does not have the full ability to deliver anode current as "real" NOS 7591 from the past do. 7591 and 7868 have the same internals, and electrically they are the same. The JJ 7591-S vacuum tube is a high quality option for both guitar and home audio amps. O. The 6GM5 and 7868 are essentially the same tube but they do have different pin-outs so they would The significant difference (aside from socket wiring) between the 7591 and 6L6 is the tube's transconductance. Well, now we got 'em. I'm laying out the chassis for a 7591a amp using the iron (both power and output) from a Fisher 500B receiver. This tube works for HH Scott amplifiers to the instrument amplifiers that use the 7591. It fits in TDSL Tube data [7591] Tube Data Sheet Locator The only true equivalent to 7591 (a FANTASTIC tube in its' Westinghouse 1960s original version) is the novar-base, equally spectacular, 7868. 27 inches (33 mm) dia. 3 Plate: 20 Top: CDFH (D and H bold) Bottom: EG (G bold) The Reissue of the rare NOS Tung-Sol 7591A. E-H has introduced a true 7591. I'm surprised to know that Westinghouse If he is using a Heathkit IT-17 tube tester, the Supplemental Test Data Sheet lists the 7591 as follows: Type: 3 Fil. Can I test them as a 6L6? or is there an equivalent setting I Hoffman Amplifiers Tube Amp Forum, 7591 tubes Thanks Tubenit. I was lucky that it worked, and actually sounds good. Transconductance (Gm) is described in units of mhos (usually in so I'm sure there's a way to get it into the 18watt zone.
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