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Old 30th January 2010, 09:21 PM   #21
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OK im getting my list together for stuff i have no clue about:

EDCOR - XPWR059

2x EDCOR - GXSE15-4-5K

Parts-Express.com:*Hammond 193H Filter Choke | voltage power supply power hammond filters filter choke

Supplemental motor run caps???:


2 of these?

Motor Run Capacitor 45500H 50uf 440V DiversiTech - eBay (item 200401474310 end time Jan-31-10 16:42:42 PST)

1 of these?
80 uf 500 VAC Oil Filled Motor Run Capacitor Eyuda - eBay (item 310195976442 end time Feb-20-10 08:33:59 PST)

Im still working on figuring out audio caps and tubes.

speakers will be similar to these(dave brown's db717TL):

Parts Express DIY Project
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Old 30th January 2010, 09:36 PM   #22
rknize is offline rknize  United States
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Quote:
Originally Posted by nightanole View Post
OK im getting my list together for stuff i have no clue about:

EDCOR - XPWR059
That will work. Others have used it. I prefer for XPWR35 myself as it has more capacity for B+ (200mA).

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Originally Posted by nightanole View Post
Looks right.

This one has a rather low DCR, but it will work. You should add some series resistance to it, like a 50-100 ohm 5W resistor. The 193J is a better choice (more inductance and 82 ohm DCR). The Triad C-14X choke from Allied is half the price and has a perfect 150 ohm DCR but is ugly.

Triad Magnetics - C-14X - Allied Electronics

Either setup will work. Remember you can use any 370VAC motor run cap as well. They are good to at least 520VDC...more in reality.
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Old 31st January 2010, 03:51 AM   #23
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I use the 80uF Eyuda for both my Simple SE and Tubelab SE. Seems to be a decent cap. I ought a few extra for someother projects as well.
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Old 31st January 2010, 09:38 PM   #24
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Quote:
B+ voltage = your actual B+ rail
Load Z = the primary impedance of the OPT
Vp = output tube plate voltage (B+ - OPT drop)
Vk = output tube cathode voltage
Rk = cathode resistor value (R17,R27)
Ik = cathode current
Diss (idle) = output tube plate dissipation at idle (no sound)
Pwr Out = maximum power output
Dist - 2nd = second harmonic distortion
Dist 3rd = 3rd harmonic
DF = dampening factor (how well the output can cope with varying speaker impedance), etc....
Beautiful, Russ!
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Old 31st January 2010, 10:09 PM   #25
rknize is offline rknize  United States
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Thanks to George for that table. It really drove the idea home to me.
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Old 1st February 2010, 06:14 PM   #26
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Quote:
Originally Posted by nightanole View Post
Does anyone have a simple break down of costs of a simple SE?
I built mine in 2008. The cost came up something like this. All pricing includes shipping charges.

$132.59 Hammond 374BX and 159Q (tubesandmore.com)
$104.00 Transcendar 5K:8 OPT (ebay.com)
$43.00 circuit board (tubelab.com)
$57.22 parts (mouser.com)
$14.59 parts (digikey.com)
$11.95 sockets (tubedepot.com)
==========
$363.35 total

The chassis was basically free, built out of scrap lumber and aluminum plate. I didn't include the cost of tubes, but I've more or less "invested" a small fortune in more tubes than I should probably own. The transformer cost could have been cut in half by using Edcor and/or Allied parts, but I am very happy with the Hammonds and Transcendars and consider it money well spent.
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Old 1st February 2010, 08:44 PM   #27
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Quote:
Originally Posted by rknize View Post
That will work. Others have used it. I prefer for XPWR35 myself as it has more capacity for B+ (200mA).
Edcor has quite a few power transformers that appear to be suitable for the Simple SE. I figure you could make any of the following work:

XPWR002, 720VCT@220mA, $57.33
XPWR033, 760VCT@200mA, $59.48
XPWR035, 740VCT@200mA, $66.01 (only 2A@5V, don't use 5U4)
XPWR048, 700VCT@300mA, $90.33
XPWR059, 750VCT@175mA, $74.45 (120/240V primary)
XPWR134, 750VCT@200mA, $84.30
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Old 2nd February 2010, 10:24 PM   #28
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Quote:
Originally Posted by Ty_Bower View Post
Edcor has quite a few power transformers that appear to be suitable for the Simple SE. I figure you could make any of the following work:

XPWR002, 720VCT@220mA, $57.33
XPWR033, 760VCT@200mA, $59.48
XPWR035, 740VCT@200mA, $66.01 (only 2A@5V, don't use 5U4)
XPWR048, 700VCT@300mA, $90.33
XPWR059, 750VCT@175mA, $74.45 (120/240V primary)
XPWR134, 750VCT@200mA, $84.30
The Edcor 134 looks interesting.
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Old 4th February 2010, 04:51 AM   #29
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Out of curiosity. With the Edcor XPWR134 with these specs:
750V(375-0-375)@200mA, 6.3V@3A, 6.3V@3A & 5V(2.5-0-2.5)@3A

Would you just parallel the 6.3v windings to get a 6amp 6.3v supply making sure to keep the polarity straight?
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Old 4th February 2010, 05:02 AM   #30
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Yep...that would work.
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