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SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION

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Posted on August 4, 2012 at 10:18:18
DAK
Audiophile

Posts: 323
Location: PACIFIC
Joined: August 8, 2010
 I just picked up this little stereo single ended 6bq5 amp which probably came out of an old console stereo. The driver tube that is supplied was a 6AN8. I don't know anything about the amp as it has no tags or identification but that 6AN8 doesn't seem to be correct.
I would think that the input tube would be a dual triode so that each channel would receive an equal signal. The 6an8 is used with push pull amps as a driver/splitter tube for each channel. That doesn't seem like a tube needed for this single ended amp.
If anyone knows or has info about this type of amp please let me know. thanx in advance, Dak

 

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RE: SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION, posted on August 5, 2012 at 10:39:49
Jim McShane
Dealer

Posts: 4781
Location: Chicago
Joined: January 13, 2003
 There is only one 6AN8? Or one per channel?

 

RE: SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION, posted on August 5, 2012 at 13:55:50
DAK
Audiophile

Posts: 323
Location: PACIFIC
Joined: August 8, 2010
 Yes sir, just the one 6an8. It did not make sense to me so I thought i would ask the folks out there if anyone had an amp like it to compare. I have no schematic, but i guess i should trace out the connections to the input tube and see what that indicates. Thanx for checking. best regards, Dak

 

RE: SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION, posted on August 5, 2012 at 14:56:30
ahendler
Audiophile

Posts: 2461
Location: San Antonio, Texas
Joined: January 24, 2003
 It could use a solid state setup or an interstage transformer to develop the split signal
Alan

 

RE: SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION, posted on August 5, 2012 at 15:56:50
DAK
Audiophile

Posts: 323
Location: PACIFIC
Joined: August 8, 2010
 The amp is a stereo unit with a single el84 per channel and as i received it, there was a 6an8 for the input/driver tube which doesn't seem right. Even if the signal was split before the 6an8 how does that tube work since it is a pentode + triode unit.

 

RE: SINGLE ENDED EL84 STEREO AMP INPUT TUBE QUESTION, posted on August 8, 2012 at 12:21:51
Mechans
Audiophile

Posts: 1068
Location: East Coast
Joined: May 23, 2004
Contributor
  Since: May 6, 2012
 A minor suggestion, please don't use all CAPS it seems like yelling to me. All caps is thought to be impolite, for your benefit Just sayin---

Steve

 

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