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8005's as modulators




 
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Author Topic: 8005's as modulators  (Read 4751 times)
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WZ1M
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« on: April 21, 2008, 06:54:05 AM »

OK, whats the opinion of using 8005's as modulators. I have a pair of these and thiking about driving the 8005's with a pair of 6l6G's. Any coments and thoughts would be well received.
Regards,
Gary...WZ1M
See ya at Nearfest................ Grin
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The Slab Bacon
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« Reply #1 on: April 21, 2008, 08:10:24 AM »

Gary,
       8005s are nice triodes, but made of unobtanium. It took me 2 years to find a spare pair for a transmitter that I have. If you are looking for something in that power range I'd consider 811As instead, since they are a lot easier to come by than 8005s and 811As will wirk fine with 0 bias where 8005s wont. Just my $.02 worth.

                                                                     The Slab Bacon
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"No is not an answer and failure is not an option!"
WA1GFZ
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« Reply #2 on: April 21, 2008, 08:37:23 AM »

We have a mac 200watt test amp here at work and I thought one tube was bad. I found a pair on the web for almost $200. Lucky the problem was a dirty contact in the tube socket but one tube has run very hot so its days are numbered. I would use something easier to find. 
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WZ1M
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« Reply #3 on: April 21, 2008, 09:09:06 AM »

Thanks for the advice guys. Seeing I allready have a stash of 8005's and 6L6G's, thought I would conjur up something a little different than you normaly hear. Also have a nice mod transformer to try in this application.
Regards,
WZ1M, Gary
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k4kyv
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Don
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« Reply #4 on: April 21, 2008, 02:28:06 PM »

I use 8005's in the final of one of my HB rigs.  I have a couple of spares.  I did have one more spare,  but I let one slip out of my hands and dropped it about 1 foot onto a carpeted rug and opened up the filament.  Angry

Here's why transmitting triodes like the 2A3, 211, 845 and 8005 are made of unobtainium:

Goddam Audiophools
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Don, K4KYV                                       AMI#5
Licensed since 1959 and not happy to be back on AM...    Never got off AM in the first place.

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WBear2GCR
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Brrrr- it's cold in the shack! Fire up the BIG RIG


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« Reply #5 on: April 21, 2008, 03:21:33 PM »

Long before anyone much in the USA was buying up old tubes, the asians did.
First the Japanese, then the Hong Kongese, followed by the Koreans then finally the 3 billion Chinese got their paws on anything "Made in USA" that was a DHT.

It wasn't until mid 90s or later that the average doodly doo USA audio toob-o-phile got excited about what was under their noses for decades...

Blame the asians Don, not anyone else.
The american audio nuts were very very late to the party, after mostly the scraps were left...

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_-_- bear WB2GCR                   http://www.bearlabs.com
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