Amp that uses 6AQ5 tubes?

Axtman · 06-06-2009, 02:03 AM

Do you guys know if there is a guitar amp that uses 6AQ5 miniature 7 pin output beam tetrode tubes?

Tubenit · 06-08-2009, 03:40 AM

There are a few. Gibson Scout 17-RVT uses 6AQ5 with 305v on the plates.

With respect, Tubenit

dkevin · 06-08-2009, 03:52 AM

The Gibson Crestline GA-5 Skylark amps use 6AQ5's in pairs.

Tubenit · 06-08-2009, 01:00 PM

This is a version of DaGeezer's Little Wing amp that originally used 6BM8 tubes. I drew up this schematic but never got around to building the amp.

I have a layout for it also.

Should use a 270 ohm cathode resistor for the 6AQ5's, I think. (per Gibson schematics)

With respect, Tubenit

Tubenit · 06-08-2009, 02:20 PM

Ok, I also found another schematic that I drew up some time ago and have built as an amp. It has a layout with it also.

I think the value on the cathode attenuation resistor may be incorrect? I may need to be 540 ohms for each one individually? (or something close to that?)

With respect, Tubenit

Tubenit · 06-08-2009, 02:34 PM

I built the 56T with EL84's. It's perhaps the most touch sensitive amp I've played? I think a version of it could be done with 6AQ5's, but have not built one.

Check for errors in the schematic.

With respect, Tubenit

hasserl · 06-09-2009, 03:13 AM

The early versions of Fender's Musicmaster Bass amp used 6AQ5's. Very nice amps!

airweld · 06-09-2009, 05:32 AM

Adam Alpern has one with a single 12A_7 and single 6AQ5. I built one and connected it to a Weber 8" speaker and called it a harp amp. It sounded good to me.

capnjuan · 07-03-2009, 03:23 PM

The Gibson GA5T (first 'Crest' version) used twin 6AQ5s as did the Guild 66J. There's also a drop-in substitute, the 6005. J

StarGeezers · 11-01-2009, 02:23 PM

Gentlemen , we tried a SE 6AQ5 amp with the 6U8 preamp , http://www.wattkins.com/node/15993 ... The amp sounded good , but had a somewhat "ratty quality" to the tone...tried many changes , no luck ... even went with higher V PT ... same thing ??? ... You guys have any idea what could be causing that ???

StarGeezers · 11-09-2009, 01:23 PM

OK, we're now working on a 6AQ5 PP amp ... Looking for a suitable PT to supply the necessary 250-275 V at the plates... You guys have any preference ???

Johnrcurry · 11-14-2009, 08:26 PM

Here's a thread discussing a 6aq5-based tweed deluxe type clone that I built a while back. . . .

6AQ5-Based 5e3 Guitar Amp Build

06-06-2009, 02:03 AM	#1
Axtman Member Join Date: Feb 2007 Posts: 50	Amp that uses 6AQ5 tubes? Do you guys know if there is a guitar amp that uses 6AQ5 miniature 7 pin output beam tetrode tubes?

06-08-2009, 03:40 AM	#2
Tubenit Senior Member Join Date: Jul 2007 Location: Charlotte, NC Posts: 118	6AQ5 amp There are a few. Gibson Scout 17-RVT uses 6AQ5 with 305v on the plates. With respect, Tubenit

06-08-2009, 03:52 AM	#3
dkevin Member Join Date: Mar 2009 Location: Seattle, WA. Posts: 22	6AQ5 output tubes The Gibson Crestline GA-5 Skylark amps use 6AQ5's in pairs.

11-14-2009, 08:26 PM	#12
Johnrcurry Member Join Date: Feb 2008 Posts: 27	Amp that uses 6AQ5 tubes? Here's a thread discussing a 6aq5-based tweed deluxe type clone that I built a while back. . . . 6AQ5-Based 5e3 Guitar Amp Build

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06-09-2009, 03:13 AM	#7
hasserl Senior Member Join Date: May 2006 Posts: 622	The early versions of Fender's Musicmaster Bass amp used 6AQ5's. Very nice amps!

07-03-2009, 03:23 PM	#9
capnjuan Member Join Date: Apr 2007 Posts: 101	The Gibson GA5T (first 'Crest' version) used twin 6AQ5s as did the Guild 66J. There's also a drop-in substitute, the 6005. J

11-01-2009, 02:23 PM	#10
StarGeezers Junior Member Join Date: Oct 2008 Posts: 3	Gentlemen , we tried a SE 6AQ5 amp with the 6U8 preamp , http://www.wattkins.com/node/15993 ... The amp sounded good , but had a somewhat "ratty quality" to the tone...tried many changes , no luck ... even went with higher V PT ... same thing ??? ... You guys have any idea what could be causing that ???

11-09-2009, 01:23 PM	#11
StarGeezers Junior Member Join Date: Oct 2008 Posts: 3	OK, we're now working on a 6AQ5 PP amp ... Looking for a suitable PT to supply the necessary 250-275 V at the plates... You guys have any preference ???

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