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Message started by SMB1968 on 07/29/13 at 23:40:15

Title: Tube Question
Post by SMB1968 on 07/29/13 at 23:40:15

Can I use a 6BQ7A in the input position on a Rachel and/or a CSP2+? Thanks
Scott

Title: Re: Tube Question
Post by Rizlaw on 07/30/13 at 02:23:08

IMO, I think the safe answer is no a qualified yes for experimental tube rolling purposes.  http://www.radiomuseum.org/tubes/tube_6bq7a.html

In addition to "Lin's" post below, you may also consider looking at the first 3 or 4 posts in this thread: http://www.diytube.com/phpBB2/viewtopic.php?p=23087  which say that while usable, for linearity, noise and microphonic reasons the 6BQ7A is not a better replacement for 6NP1-EV/6922 type tubes.  It appears this type of tube is mostly used in the front end of FM Tuners. That said, on Decware Forums "Rivieraranch" likes the 6BQ7A and 6N1P and "Lon" prefers the 6n1p (see "Lin's" post below).

However, notwithstanding the desire to experiment, which many of us have, Steve's recommendation for the input positions of the SE34I.3 "Rachael" or CSP+, are either the 6N1P-EV or 6DJ8 family of tubes (6922, E88CC, 7308, E188CC, CCa, 6H23, PCC88, 7DJ8).

In the end it's all in the ears of the listener. ;)




Title: Re: Tube Question
Post by Lin on 07/30/13 at 02:43:52

A few posts here:
http://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1262714907/15

and here:
http://www.audiokarma.org/forums/showthread.php?t=259300


Title: Re: Tube Question
Post by SMB1968 on 08/01/13 at 18:01:37

Thanks gents

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