Help me wade through power supply options - Edcor?

[Lonely Raven]

I've been collecting parts for a 5E3 build, and I realized I have almost enough parts to build *two* 5E3 amps! I really just need a second power transformer and that's about it...

I'm thinking about trying out Edcor since they get favorable reviews here, and I have an uncut/undrilled aluminum chassis as my base...so any transformers would "fit"...but I've overwhelmed with what is correct for a 5E3 power transformer.

Every power transformer I look up the specs for, that is called "5E3 tweed deluxe", seems to have different specs. So what would be good or correct specs? Can someone point me to a correct model on Edcors page, please?

My first 5E3 I have a Weber PT and Triode OT, but I've heard grumbles about both online...so I'm not sure I have the best options there.

For the second 5E3, I figured I'd go Edcor PT and OT, and maybe build it so it could take 6L6 tubes while I'm at it.

Suggestions?

[Structo]

Triode would be Magnetic Components out of Chicago and they get pretty good ratings.
I have a set in my 100w ODS and no complaints.

[Phil_S]

You will probably do just fine with a 325-0-325 @ 70mA for a 5E3. I don't think you need to be picky about it either -- a few volts this way or that won't be noticed. 100mA is plenty and 120mA is way more than that circuit needs. For the filament supply you need 5V@2A and 6.3V@2A and that allows something for the pilot light on the 6.3V winding.

Magnetic Components has one for a reasonable price. Musical Power Supplies has one for even less, I think.

[David Root]

You need a PT that will give you 365 Vp on your RCA 6V6GT/G power tubes. That will give you 5E3 hog heaven! 375 Vp is OK too I find with GT/G spec tubes. These are from the '40s and are US military spec grade from WWII. Your Grandad's tax dollars at work!

Don't settle for 6V6GT, the old GT/G designation means -GT tubular glass but with the earlier -G coke bottle spec.

This sounds dumb but believe me it is not. Just check out the difference in NOS prices between any GT/G spec, Ken-Rad, Tung-Sol and RCA and the GT only spec. There IS a reason for that.

Mo' bass, slightly rolled off top, sounds VERY FINE in a 5E3!

OTOH, the '50s RCA GTs work fine in a brown 6G3 Fender Deluxe, higher gain preamp, 220K/3K3 vs 100K/1k5, and fixed bias. Ask me how I know this. The surprises are part of the fun!

[Lonely Raven]

Now see, I'm even more confused. I just need someone to point out an Edcor that would work for me. Please!

[Phil_S]

http://www.edcorusa.com/category/37-xpw ... oltage=327
XPWR047-120
330-0-330 @ 120mA
6.3V @2.5A
5V@3A
$53.56

It seems you are set on going with an Edcor, but I am not understanding that.

For $39.95 you can get the PT325.2 here and it will do very nicely:
http://www.musicalpowersupplies.com/4.html

For $46.50 you can get model # 40-18016 from Magnetic Components:
http://store.triodestore.com/deretrvipo ... ipotr.html

Of course, please choose whatever floats your boat. You really can't go wrong with any of them.

[Lonely Raven]

http://www.edcorusa.com/category/37-xpw ... oltage=327
XPWR047-120
330-0-330 @ 120mA
6.3V @2.5A
5V@3A
$53.56

It seems you are set on going with an Edcor, but I am not understanding that.

For $39.95 you can get the PT325.2 here and it will do very nicely:
http://www.musicalpowersupplies.com/4.html

For $46.50 you can get model # 40-18016 from Magnetic Components:
http://store.triodestore.com/deretrvipo ... ipotr.html

Of course, please choose whatever floats your boat. You really can't go wrong with any of them.

Seriously...because it's pretty!

Thanks though, that's exactly what I needed.

[M Fowler]

Those Edcor trannies are so well made and sound very good and I agree they look damn good.

Mark

[Lonely Raven]

I've got an 8k 25 watt 4-8-16 Edcor OT in my shopping cart, plus the PT listed above. Thanks guys!

[FunkyE9th]

I like Edcor a lot for PTs. I've only tried one of the their OTs, a HiFI OT, and it was not the sound I was looking for. Not that it was bad, just not what I was after. Maybe I should have tried their non-HiFi GXPP line of OTs. If you are looking for a "5E3 sound" I recommend Mojotone 5e3 OT which I've used and like. Or try the Edcor GXPP line or Magnetic components, but I haven't tried.

On your original post you mentioned you are also looking to maybe build it for 6L6. If you are, then your PT requirements will be a lot different. 120mA for a pair of 6l6 is not something I would use. Also, for a pair of 6L6, I don't think you should use a 5Y3 rectifier. I would use a GZ34 ( or go SS), but then that means you will have less of a voltage drop, so a 330-0-330 PT with GZ34 will give you a higher B+, fine for a 6l6 but not so good for the a 6V6. You'll also probably have to up the voltage rating of your electrolytics.

I think this one will be good to handle 6v6/6l6 PT requirements...

http://edcorusa.com/products/597-xpwr008_120.aspx

It does not have a CT for the 6.3 heater though and I wish it was 250mA instead of 200mA, but I think it should be fine. I've seen 200mA spec'd for some Fenders driving a pair of 6l6.

Your OT requirements will also change if you decide to also run 6l6.

[Lonely Raven]

Hrm. I have a CXPP OT in my shopping cart...the GXPP only go up to 15 watts.

[FunkyE9th]

If you are only looking to build it for 6V6, then I would think 15 Watts for a pair of 6V6 should be fine.

[Phil_S]

It seems you are set on going with an Edcor, but I am not understanding that.

Seriously...because it's pretty!

I suspected as much. It's as good of a reason as any to buy the Edcor. Enjoy.

[Lonely Raven]

It seems you are set on going with an Edcor, but I am not understanding that.

Seriously...because it's pretty!

I suspected as much. It's as good of a reason as any to buy the Edcor. Enjoy.

Sorry to disappoint .... You'll notice nowhere did I say, find me the cheapest, ugliest 5E3 PT available.

[rdjones]

Seriously...because it's pretty!