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| | #1 |
| Member Join Date: May 2008 Location: minnesota
Posts: 50
| 4 7591 power tubes...
I have 2 amps that both use a pair of 7591 power tubes with various preamp tubes. I was wondering if there were any amps that have been made that use 4 7591 power tubes. I looked and all I found was some old fisher hi-fi stereos that used them. I really like the sound of the 7591 tube, as opposed to a 6L6 quad, or an EL84 quad. But the amps that I have found that use 7591's seem to put out at most, like 30 watts, and I really would like to have like 50+ watts. Is there something inherent about the 7591 tube that disallows it to be used in a quad? what's up with that? |
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| | #2 |
| Senior Member Join Date: Dec 2008 Location: Wernersville, PA
Posts: 129
| Parallel tubes
I would not think the tube itself would care how many you use in parallel The circuit itself would. |
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| | #3 |
| Senior Member Join Date: Jun 2006 Location: California, USA
Posts: 611
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There is nothing inherent about the 7591 tube that disallows it to be used in a quad. It is just from an era where the designer would change to another tube type if power output in the 50 watt region was desired.
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| | #4 | |
| Member Join Date: Apr 2009
Posts: 86
| Quote:
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| | #5 | |
| Member Join Date: Dec 2008
Posts: 59
| Quote:
Hammond use them in a few of their later designs. | |
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| | #6 |
| Senior Member Join Date: Dec 2008 Location: Wernersville, PA
Posts: 129
| 7591 heaven
I have two pairs of these 7591 tubes in my Fisher 800-B. I think it is a synergy thing. Fisher- 7591. This amp sounds |
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| | #7 | |
| Member Join Date: Apr 2007
Posts: 101
| Quote:
![]() The power output of tubes is a function of the ability of tube to handle voltage on its plate and current. Link to the Tube Data Sheet for the 7591A: http://www.tubezone.net/pdf/7591.pdf The tube was very popular in the mid-60s because of increased power handling / cleaner tone v. 6V6s; Ampeg, Gibson, Guild, Audio Guild ... many others made 7591 amps ... usually 25-30 watts for push/pull twins. I don't know of any other quad 7591 designs. CJ | |
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