Posted by Poindexter [ 4.63.6.102 ] on May 01, 2005 at 16:31:51:
In Reply to: Questions posted by Mark Williams on May 01, 2005 at 13:52:45:
1) The basing of the 6AQ5/6005 is 7BZ. That's the size (miniature 7-pin) and pin assignment. Not all are actually 7BZ, though; some have the control grid to both pins 1 and 7, and some only to pin 1, by my research. I suppose that would be a different base code. All the ones I have gotten have pin 7 hot to the grid, but I don't wire to that pin; only pin 1.
2) 6AQ5, 6AQ5A, 6AQ5W/6005 that I have gotten are all exactly the same (from the same manufacturer). It seems to me that the 6AQ5W/6005 are a little less microphonic and a little more uniform in their characteristics; it's probably a selection thing. I'm trying to decide if they sound better or not. I think maybe slightly.
3) Bless you, my man. You know, not one person in four ever flashes on that little detail of the implementation. I am a forty-year maker of musical instruments, aircraft, sailing yachts, and this stuff. The umbilical wiring (B+, circuit ground, chassis ground, heaters) runs through the chassis wall. I will bring one of these to your house, and with a magnifying glass you will not find how I did it. You have just appeased my (considerable about this stuff) vanity, so if you beg me, maybe I'll tell.
Yer admirer,
Poinz
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