65N7GT equivalent? - UK Vintage Radio Repair and Restoration Discussion Forum

the_snark · 1st Feb 2009, 11:57 am

A friend of mine gave me and Advance J2 oscillator which, after reforming the electrolytics and replacing a dodgy looking Hunts cap, works but the output is distorted. I tracked it down to the oscillator valve which is a 65N7GT double triode. I have scoured the internet but I can find no information about it or anybody selling one. Does anyone know of an equivalent or where I can get a replacement.

Brian R Pateman · 1st Feb 2009, 12:08 pm

Tim,

The valve is a 6SN7GT and the equivalent is ECC32.

Nothing fancy, any double triode with 6.3V heater will probably work.

Regards,

mickjjo · 1st Feb 2009, 12:11 pm

I think you mean 6SN7GT, Quite common with equivalents 13D2, B65, CV1998.

http://www.r-type.org/exb/exb03807.htm

Regards, Mick.

the_snark · 1st Feb 2009, 12:55 pm

No wonder I couldn't find it. I must need new glasses, it sure looked like a 5 to me. Thanks for a quick response.

Herald1360 · 1st Feb 2009, 2:38 pm

ECC82 / 12AT7 would probably be fine- even with the adaptor you'ld need to avoid modifying the chassis it would be about the same size.

Chris

the_snark · 1st Feb 2009, 4:00 pm

Having seen what price 6SN7GTs go for on ebay an ECC82 may be a good idea.

Sideband · 1st Feb 2009, 4:11 pm

Wilson valves or Langrex may be able to supply a new valve cheaper than eBay. See suppliers on the main website.

Rich.

XTC · 1st Feb 2009, 4:16 pm

Try phoning Jim Fish at Wilson Valves or Valve and Tube Supplies on the IOW. Langrex,Colomor and CVC are akso likely to be able to help.

EBay isn't necessarily the cheapest or best place to buy things.

Pete.

Phil G4SPZ · 1st Feb 2009, 5:34 pm

I have a number of tested 6SN7GTs. You can have one for the price of postage - please send me a PM with your address.

paulsherwin · 1st Feb 2009, 6:06 pm

Quote:

Originally Posted by the_snark

Having seen what price 6SN7GTs go for on ebay an ECC82 may be a good idea.

They attract the attention of the valve audio people which inflates the price. A valve from a low prestige maker such as Zaerix or Pinnacle will be cheaper.

Sig generators normally use one triode as an RF oscillator and another as an audio oscillator to provide modulation. Most valves will work in these positions. An ECC81, ECC82 or ECC83 should work, and an ex TV PCC84 should also be OK despite the heater being slightly underrun. It's not difficult to make an adaptor using an old octal valve base.

Paul

n_r_muir · 1st Feb 2009, 10:47 pm

Hi,

I think the valve that you need is a 6SN7GT, an octal based double triode that should be quite easy to obtain.

The other valves in the Advance J2 should be a 6J5GT, 6V6GT AND A 6X5GT rectifier.

the_snark · 14th Feb 2009, 6:33 pm

Hi,

I would like to say a big thank you to Phil G4SPZ for providing me with a valve for the price of the postage. I plugged the valve in today and the oscillator is now working fine.

Phil G4SPZ · 14th Feb 2009, 7:11 pm

Tim - delighted to hear the valve did the trick! Another piece of vintage test gear singing again.

All the best,

1st Feb 2009, 11:57 am	#1
the_snark Triode Join Date: Mar 2007 Location: Maldon, Essex, UK. Posts: 29	65N7GT equivalent? A friend of mine gave me and Advance J2 oscillator which, after reforming the electrolytics and replacing a dodgy looking Hunts cap, works but the output is distorted. I tracked it down to the oscillator valve which is a 65N7GT double triode. I have scoured the internet but I can find no information about it or anybody selling one. Does anyone know of an equivalent or where I can get a replacement. __________________ Tim. Come over to the dark side ........... We have cookies!

1st Feb 2009, 12:08 pm	#2
Brian R Pateman Nonode Join Date: Jun 2005 Location: Western Lake District, Cumbria (CA20) - UK Posts: 2,136	Re: 65N7GT equivalent? Tim, The valve is a 6SN7GT and the equivalent is ECC32. Nothing fancy, any double triode with 6.3V heater will probably work. Regards, __________________ Brian

1st Feb 2009, 12:11 pm	#3
mickjjo Rest in Peace Join Date: Jul 2004 Location: Dartford, Kent, UK. Posts: 1,661	Re: 65N7GT equivalent? I think you mean 6SN7GT, Quite common with equivalents 13D2, B65, CV1998. http://www.r-type.org/exb/exb03807.htm Regards, Mick.

1st Feb 2009, 12:55 pm	#4
the_snark Triode Join Date: Mar 2007 Location: Maldon, Essex, UK. Posts: 29	Re: 65N7GT equivalent? No wonder I couldn't find it. I must need new glasses, it sure looked like a 5 to me. Thanks for a quick response. __________________ Tim. Come over to the dark side ........... We have cookies!

1st Feb 2009, 2:38 pm	#5
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: 65N7GT equivalent? ECC82 / 12AT7 would probably be fine- even with the adaptor you'ld need to avoid modifying the chassis it would be about the same size. Chris

1st Feb 2009, 4:00 pm	#6
the_snark Triode Join Date: Mar 2007 Location: Maldon, Essex, UK. Posts: 29	Re: 65N7GT equivalent? Having seen what price 6SN7GTs go for on ebay an ECC82 may be a good idea. __________________ Tim. Come over to the dark side ........... We have cookies!

1st Feb 2009, 4:11 pm	#7
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,571	Re: 65N7GT equivalent? Wilson valves or Langrex may be able to supply a new valve cheaper than eBay. See suppliers on the main website. Rich. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....

1st Feb 2009, 4:16 pm	#8
XTC Retired Dormant Member Join Date: Oct 2004 Location: Bristol, UK. Posts: 837	Re: 65N7GT equivalent? Try phoning Jim Fish at Wilson Valves or Valve and Tube Supplies on the IOW. Langrex,Colomor and CVC are akso likely to be able to help. EBay isn't necessarily the cheapest or best place to buy things. Pete.

1st Feb 2009, 5:34 pm	#9
Phil G4SPZ Dekatron Join Date: Apr 2005 Location: Bewdley, Worcestershire, UK. Posts: 4,748	Re: 65N7GT equivalent? I have a number of tested 6SN7GTs. You can have one for the price of postage - please send me a PM with your address. __________________ Phil Optimist [n]: One who is not in possession of the full facts

1st Feb 2009, 10:47 pm	#11
n_r_muir Hexode Join Date: Jul 2007 Location: Edinburgh, UK. Posts: 344	Re: 65N7GT equivalent? Hi, I think the valve that you need is a 6SN7GT, an octal based double triode that should be quite easy to obtain. The other valves in the Advance J2 should be a 6J5GT, 6V6GT AND A 6X5GT rectifier.

14th Feb 2009, 6:33 pm	#12
the_snark Triode Join Date: Mar 2007 Location: Maldon, Essex, UK. Posts: 29	Re: 65N7GT equivalent? Hi, I would like to say a big thank you to Phil G4SPZ for providing me with a valve for the price of the postage. I plugged the valve in today and the oscillator is now working fine. __________________ Tim. Come over to the dark side ........... We have cookies!

14th Feb 2009, 7:11 pm	#13
Phil G4SPZ Dekatron Join Date: Apr 2005 Location: Bewdley, Worcestershire, UK. Posts: 4,748	Re: 65N7GT equivalent? Tim - delighted to hear the valve did the trick! Another piece of vintage test gear singing again. All the best, __________________ Phil Optimist [n]: One who is not in possession of the full facts