UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

jjl · 28th Jul 2006, 10:10 pm

Hello Adi

Don't know whether this has been mentioned before but the EL37 is not a common valve & is sought after in valve collector and "audiophool" circles, so it might not be such a good idea to push your EL37 pair too hard.
I believe that the EL37 was the Philips / Mullard response to the RCA 6L6 range & the GEC / Marconi / Osram KT66 & that the EL34 replaced the EL37 in the Philips / Mullard range in the early '50s .
My understanding is that the KT61 is a close relative of the 6L6. The 6L6 must have been made in huge numbers in the past & variants are in current manufacture so I'd suggest that it would be a good idea to try out some 6L6 variants in your amp e.g. the 6L6GC.

Hope this helps

John

28th Jul 2006, 10:10 pm	#2
jjl Octode Join Date: Jan 2003 Location: Ware, Herts. UK. Posts: 1,082	Re: power amp design Hello Adi Don't know whether this has been mentioned before but the EL37 is not a common valve & is sought after in valve collector and "audiophool" circles, so it might not be such a good idea to push your EL37 pair too hard. I believe that the EL37 was the Philips / Mullard response to the RCA 6L6 range & the GEC / Marconi / Osram KT66 & that the EL34 replaced the EL37 in the Philips / Mullard range in the early '50s . My understanding is that the KT61 is a close relative of the 6L6. The 6L6 must have been made in huge numbers in the past & variants are in current manufacture so I'd suggest that it would be a good idea to try out some 6L6 variants in your amp e.g. the 6L6GC. Hope this helps John