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13th November 2012, 02:44 PM
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#41 | |
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diyAudio Member
Join Date: Dec 2009
Location: Newnan GA
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Quote:
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13th November 2012, 04:02 PM
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#43 | |
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diyAudio Member
Join Date: Dec 2009
Location: Newnan GA
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Quote:
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13th November 2012, 04:19 PM
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#44 | |
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diyAudio Member
Join Date: Jul 2005
Location: South Florida
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Quote:
The 300 mA tube is the 31LR8 (31.5 volts) The 450 mA tube is the 21LR8 (21 volts) The 600 mA tube is the 16LR8 (15.8 volts) And the 6LR8 is a parallel 6.3 volt tube at 1.5 amps. These all consume 9.45 watts of heater power. If there was a 13LR8 it would run at a very non standard 725 mA. The 31LR8 and the 21LR8 were on the 75 cent list until Dales inventory got back to "normal" levels, then they were removed. I am responsible for the 6HB6 being removed from the list. The 6LU8 was indeed $2 at VacuumTubes.net some time in the past. I make spreadsheets of cheap tubes VS applications, and I have an old one listing the 6LU8. The 16LU8 and 21LU8 (12 pin version) and the 31LR8 are still on the dollar list at ESRC.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little. |
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13th November 2012, 05:02 PM
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#45 |
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diyAudio Member
Join Date: Oct 2007
Location: Tuebingen
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You lucky guys!
I don't know of any comparable place on this side of the pond. For everything with vacuum inside and at least 3pins sticking out, they will ask more than 4-5 Euro. Maybe I am just looking at the wrong places.  Martin PS: Not including ePay |
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13th November 2012, 08:25 PM
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#46 |
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diyAudio Member
Join Date: Jan 2011
Location: Los Angeles, CA
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With the schematic that vinylkid posted here. What might be a good substitute for the 5V4GA rectifier? My AC input would be ~ 355vac. I have on hand a 5R4GY (which I can't make heads or tales of the spec sheet, it seems to have more info on operational allitude, it is a JAN tube so I guess it belongs in a B-27 bomber), 5U4GB (from what I can tell wouldn't be as much voltage output as the 5V4GA), GZ34 (which doesn't appear to put out as much as the 5V4GA), and a 5Y3 (which I'm fairly sure won't do) Any suggestions?
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14th November 2012, 04:07 AM
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#47 |
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diyAudio Member
Join Date: Jun 2011
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9 pin: 6ky6, 6jg5, 6jd6, 6jc6, 6hm6, 6ej7,404
octal: 6sj7, 6j7,1232,1620 all off-springs of sorts to the mighty #15 tube and substitutes to the 6au6 tube |
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14th November 2012, 02:59 PM
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#48 |
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diyAudio Member
Join Date: Oct 2012
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Not trying to be facetious, but wouldn't it be less expensive to just buy a couple of 7-pin mini sockets? I would think that sockets would priced less than tubes. Unless you already have some of the recommended tubes, that is.
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14th November 2012, 03:16 PM
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#49 |
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diyAudio Member
Join Date: Jun 2011
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I would think so, but he wanted tube subs.
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