Quote:
Originally Posted by Tom Bavis
As far as tubes... I test 'em, replace weak ones, and if it doesn't make a noticeable difference, I put the weak one back...  I'd have a replacement set of tubes, but I wouldn't necessarily CHANGE any... Although I HAVE changed god tubes when they weren't the original brand and I had one that was.
17JK8 will cost you $1.80 at Antique Electronic Supply. If you're desperate, a 12DT8 would probably work, or a 17EW8... but it is an oddball tube, with two unequal triodes. And 50EH5 costs half of what a 50C5 costs...
If the cord clamp make you nervous, wrap the cord with Nomex or similar tough insulating material where it goes through it. |
I like that approach, meself.
My attitude is if it ain't broke don't fix it.
I get nervous about subbing in different tubes in the RF front end of a receiver; often poor tracking of the tuned circuits--or sporadic and unwanted oscillations--can result.
And you are right about the 50C5 vs 50EH5 price. I also noticed this about the oddball 35B5. I was tempted to rewire an old Zenith table radio to accept the more widely-used 35C5, but was pleasantly surprised at the price and availablility of the original.