Rca 7591 ?

singlecut · 05-04-2011, 07:56 PM

Are these used in any guitar amps?
Got a quad set and wonder if they are worth keeping

Case24 · 05-04-2011, 07:58 PM

Quote:

Originally Posted by singlecut

Are these used in any guitar amps?
Got a quad set and wonder if they are worth keeping

Gibson used them in the GA30RVT Crestline Invader.

mikemac · 05-04-2011, 09:49 PM

I've got them in my '66 Ampeg Gemini I. Great sounding tubes in this amp. 65 Amps just put out a model that uses them forget the name though. Great amp (I know, big suprise - a great amp from 65). Westinghouse is the grail in that tube. Don't know much about the RCA version. JJ & EH are the only current production as far as I know. If you don't keep them, let me know - always good to have more than 1 back-up.

Tuya Customs · 05-05-2011, 05:46 AM

Ask Cyg

rocknhorse1 · 05-05-2011, 06:59 AM

What are you up to over there?

Rooting around in your tube stash? You retubeing the HRM/Hot Cat?

singlecut · 05-06-2011, 04:49 PM

Quote:

Originally Posted by rocknhorse1

What are you up to over there?

Rooting around in your tube stash? You retubeing the HRM/Hot Cat?

up to no good as usual man

>Photi G< · 05-06-2011, 05:02 PM

My friend's old Ampeg uses them. I think that New Sensor is starting a new line of them, since a lot of older Ampegs, and obscure amps used them, and their supply is diminishing.

Cygnus X1 · 05-06-2011, 05:22 PM

Quote:

Originally Posted by Tuya Customs

Ask Cyg

Those are great tubes, for the amps mentioned above.
I gave a couple to someone around here...

BillB1960 · 05-06-2011, 07:41 PM

Quote:

Originally Posted by singlecut

Are these used in any guitar amps?
Got a quad set and wonder if they are worth keeping

According to the information I could find RCA didn't actually manufacture the 7591, they bought them from Sylvania or sometimes Westinghouse. Just a cursory investigation shows that a matched quad of those babies could fetch a pretty penny.

Case24 · 05-06-2011, 07:49 PM

Quote:

Originally Posted by BillB1960

According to the information I could find RCA didn't actually manufacture the 7591, they bought them from Sylvania or sometimes Westinghouse. Just a cursory investigation shows that a matched quad of those babies could fetch a pretty penny.

This is a handy link for checking EIA codes to see who actually manufactured the tube (or speaker, etc). Commonly Seen EIA Codes

rocknhorse1 · 05-06-2011, 08:45 PM

Quote:

Originally Posted by Case24

This is a handy link for checking EIA codes to see who actually manufactured the tube (or speaker, etc). Commonly Seen EIA Codes

That is a good one Case, I have had it in my bookmarks. Comes in handy when buying tubes or dating them....not actually taking them out for drinks or anything, but like finding the date they were made. I had to explain that, I didn't want anyone to think I was weird or something.

lespaul01 · 05-06-2011, 08:59 PM

Quote:

Originally Posted by rocknhorse1

Comes in handy when buying tubes or dating them....not actually taking them out for drinks or anything, but like finding the date they were made. I had to explain that, I didn't want anyone to think I was weird or something.

05-04-2011, 07:56 PM	#1 (permalink)
singlecut Senior Member Join Date: Jul 2007 Location: where the devil don't stay Posts: 6,979 Thanks: 207 Thanked 235 Times in 64 Posts	Rca 7591 ? Are these used in any guitar amps? Got a quad set and wonder if they are worth keeping __________________ [SIGPIC]

05-04-2011, 09:49 PM	#3 (permalink)
mikemac Senior Member Join Date: Dec 2009 Location: Philadelphia, PA Posts: 191 Thanks: 2 Thanked 5 Times in 1 Post	Re: Rca 7591 ? I've got them in my '66 Ampeg Gemini I. Great sounding tubes in this amp. 65 Amps just put out a model that uses them forget the name though. Great amp (I know, big suprise - a great amp from 65). Westinghouse is the grail in that tube. Don't know much about the RCA version. JJ & EH are the only current production as far as I know. If you don't keep them, let me know - always good to have more than 1 back-up.

05-05-2011, 05:46 AM	#4 (permalink)
Tuya Customs Senior Member Join Date: Oct 2009 Location: Miami, Fl Posts: 3,409 Thanks: 155 Thanked 85 Times in 20 Posts	Re: Rca 7591 ? Ask Cyg __________________ Help Support My Band http://soundcloud.com/bento-box/damn-superstition

05-05-2011, 06:59 AM	#5 (permalink)
rocknhorse1 Senior Member Join Date: Feb 2010 Location: Keene, Nh. Posts: 8,774 Thanks: 134 Thanked 237 Times in 56 Posts	Re: Rca 7591 ? What are you up to over there? Rooting around in your tube stash? You retubeing the HRM/Hot Cat? __________________ "Distortion, bless it's fuzzy woolen socks" Dave Hunter "Yesterdays anger, is the sadness of today" Warren Haynes

05-06-2011, 05:02 PM	#7 (permalink)
>Photi G< Senior Member Join Date: Nov 2009 Location: Allentown Posts: 1,487 Thanks: 28 Thanked 8 Times in 4 Posts	Re: Rca 7591 ? My friend's old Ampeg uses them. I think that New Sensor is starting a new line of them, since a lot of older Ampegs, and obscure amps used them, and their supply is diminishing. __________________ Who Needs Signatures Anyways...

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