Emission Labs EML45 is current production but really expensive. Is it difficult to source 45 in the U.S. now? We had a shipment of about two dozen 45s last year from te U.S.
You can put in a 2A3 in a 45 circuit. The difference will be higher B+ (250V vs. 275V), lower current (50mA vs 35mA), and load (2.5K vs 5K). My Sovtek never complained.
You can put in a 2A3 in a 45 circuit. The difference will be higher B+ (250V vs. 275V), lower current (50mA vs 35mA), and load (2.5K vs 5K). My Sovtek never complained.
Late ST envelope type 45's can be had on eBay for relatively reasonable money. There are several companies that make the 45 currently, TJ, EML and AVVT come to mind - unfortunately these are well over $250/pr and depending on brand can be much more than this.
The 2A3 with changes previously mentioned will work, but it is a different tube, and sounds quite different. I recommend that if you want a 45 amplifier you buy good NOS or used 45's.
The 2A3 with changes previously mentioned will work, but it is a different tube, and sounds quite different. I recommend that if you want a 45 amplifier you buy good NOS or used 45's.
Hi Joe,
This is for repair on your old radio's? They are darn expensive. I would not design anything new with 45's just due to that.
I bought a few for my old sets. I refuse to pay the nutty prices for new manufacture or some of the NOS guys either. It really hurt to lay that much money down.
-Chris
This is for repair on your old radio's? They are darn expensive. I would not design anything new with 45's just due to that.
I bought a few for my old sets. I refuse to pay the nutty prices for new manufacture or some of the NOS guys either. It really hurt to lay that much money down.
-Chris
45s
The 46 will work as a good sub if you tie the grid 2 to the plate. it uses the 5pin socket so this is NOT a drop in. I have done this one several old amps for guys that want to use them, and were not concerined with altering the OEM set up. For a little more info on the 46/45 switch as well as using 2a3 in the same amp check out this web page http://www.the-planet.org/Ragtop.html
The 46 will work as a good sub if you tie the grid 2 to the plate. it uses the 5pin socket so this is NOT a drop in. I have done this one several old amps for guys that want to use them, and were not concerined with altering the OEM set up. For a little more info on the 46/45 switch as well as using 2a3 in the same amp check out this web page http://www.the-planet.org/Ragtop.html
Seriously keep an eye on eBay, they're as common as peas there, and you'll eventually find a usable pair for a reasonable price. You'll only be buying them once.
The alternative is to find your local antique radio club, they usually have swap meets where you can buy good new or used tubes from people you can actually talk to. Prices are comparable to or slightly less than eBay at the ones I have attended this year.
The alternative is to find your local antique radio club, they usually have swap meets where you can buy good new or used tubes from people you can actually talk to. Prices are comparable to or slightly less than eBay at the ones I have attended this year.
45 tubes
Hi,
I have bought many on ebay. Average for RCA Cunninghams,(my favorite), about $60 each for strong used 45's. Check seller for good feedback
Plenty up for bid as of now. Check these out.
http://search.ebay.com/search/searc...00&fpos=15610&ftrt=1&ftrv=1&saprclo=&saprchi=
Happy bidding.
mg16
Hi,
I have bought many on ebay. Average for RCA Cunninghams,(my favorite), about $60 each for strong used 45's. Check seller for good feedback
Plenty up for bid as of now. Check these out.
http://search.ebay.com/search/searc...00&fpos=15610&ftrt=1&ftrv=1&saprclo=&saprchi=
Happy bidding.
mg16
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