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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 14th March 2017, 12:49 AM   #391
mkane77g is offline mkane77g  United States
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The 3rd base is done. Needs wax. Electra Print Iron
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Old 20th March 2017, 11:48 PM   #392
Atk1d is offline Atk1d  Canada
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Very Nice work, Your Hired
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Old 28th June 2017, 05:54 PM   #393
sumotan is offline sumotan  Indonesia
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Hi Guys,
Just discovered this thread. Have a question, re Tubelab SE board, is it possible
to mod the board to work as parallel tube instead so as to gain more output power
with say a pair of 300B ?

Thks
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Old 20th August 2017, 05:16 PM   #394
mkane77g is offline mkane77g  United States
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Finally, iec, on/ off & fuse wired. Sounds quite a bit different from the unit with the Electra Print iron. Slightly bloated for lack of a better description. Let's call it (tendency for reproduced sounds to last longer than they should. Most noticeable at lower frequencies, where it obscures detail) 'hangover'.
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Old 20th August 2017, 05:32 PM   #395
zman01 is online now zman01  Bangladesh
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Quote:
Originally Posted by mkane77g View Post
Finally, iec, on/ off & fuse wired. Sounds quite a bit different from the unit with the Electra Print iron. Slightly bloated for lack of a better description. Let's call it (tendency for reproduced sounds to last longer than they should. Most noticeable at lower frequencies, where it obscures detail) 'hangover'.
What's the primary and secondary impedance rating of these Edcor's? And what about the Electra-Prints you are using in the other amp? Are all other components the same?
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Old 20th August 2017, 07:01 PM   #396
mkane77g is offline mkane77g  United States
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5k 8ohm on both the Edcor's @ EP. Components are not the same. Coupling caps are different as is motor run value cap. I just checked the tube bias on the 45's and they were not close. 24.5 & 14.6. I adjusted to 30mA using the same DMM. Amp now has some snap.
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Old 20th August 2017, 07:17 PM   #397
mkane77g is offline mkane77g  United States
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I'm also running this amp below 300v compared to 320 on the other one ITMAD.
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Old 20th August 2017, 08:55 PM   #398
mkane77g is offline mkane77g  United States
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Much better. Rectifiers set @ 165v. 45's biased, 27mA.
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Old 1st September 2017, 08:03 PM   #399
Sprags is offline Sprags  United States
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My SSE chassis is 12 X 14 X 3 in size. I have my 3 Edcor USA transformers mounted along the 14 inch width. They are about 1/2 inch apart. The two output transformers are oriented so the bells are front to back. The power transformer is oriented left to right. The choke is mounted inside the enclosure mounted between two of the transformers. I'm hoping there won't be any hum issues. What are your thoughts?

Or is the layout mkane77g better?

Last edited by Sprags; 1st September 2017 at 08:08 PM.
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Old 1st September 2017, 08:21 PM   #400
mkane77g is offline mkane77g  United States
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My other TSE has the power transformer in between OPT. Both quiet as a graveyard.
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