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flpete1uw
Senior Member
Username: flpete1uw

Post Number: 551
Registered: 11-2011
Posted on Wednesday, September 23, 2015 - 7:09 am:   Edit Post

Alembicans,
I'm thinking of swapping out the Tubes to my oldy but goodie red capped F2B. I had a conversation with the guy I purchased it from, he stated the last time he changed them was around 1999. He went on to say in that time he didn't use the unit much, whatever that means?
Browsing this forum it looks like th JJ's are the choice.
I'm curious if going with gold plated ones are really worth it, $10 each. Same specs as the none gold plated ones.
https://tubedepot.com/tube-comparison-tool
Thanks, loving the F2B!
Pete
gtrguy
Senior Member
Username: gtrguy

Post Number: 930
Registered: 9-2004
Posted on Wednesday, September 23, 2015 - 10:57 am:   Edit Post

JJ's are great and Eurotubes is a good place to get them! I imagine gold plating makes for better contact over the years, but have had no problem without it!
keith_h
Senior Member
Username: keith_h

Post Number: 2280
Registered: 2-2005
Posted on Wednesday, September 23, 2015 - 11:46 am:   Edit Post

The only advantage to the gold contacts is their resistance to oxidation over a long period. Since the F2B socket isn't gold plated it doesn't buy you anything in that regard. I can also say it has never affected any of my old radios of which all of the sockets and some of the tubes are 70-80 years old.

More important to tube selection in the F2B is the envelope size. It needs to be able to fit inside the metal can which some do not.

Keith
flpete1uw
Senior Member
Username: flpete1uw

Post Number: 552
Registered: 11-2011
Posted on Wednesday, September 23, 2015 - 11:55 am:   Edit Post

Thanks Guys,
I kind figured the gold was overkill. Great point on the socket Keith.
I was thinking these:
https://tubedepot.com/products/jj-ecc83s-12ax7-preamp-vacuum-tube
It's weird they have on the pricing side extra $ for specific qualities. Low noise? Micro phonics?
Anyway $10 a pop seams pretty good!
Pete
flpete1uw
Senior Member
Username: flpete1uw

Post Number: 554
Registered: 11-2011
Posted on Tuesday, September 29, 2015 - 4:51 pm:   Edit Post

Well replaced the old Slovek tubes with the JJ's and much much quieter noise wise.
Thanks for your input
Pete

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