Good trafo for a 5E3 w/ 2x6L6?

[boldaslove6789]

I'm getting ideas 2gether for a 5e3 build using the Ceriatone Layout for the 5E3 Deluxe w/ 2x6L6's. Looking for a good bassman type Pwr & OT trafo's. What's a good candidate? I'm just using the layout, buying parts etc. in the US. I've already got a good combo cab/chassis w/ a JBL D120.

Here's the layout.

http://www.ceriatone.com/images/layoutP ... iatone.jpg

[Phil_S]

http://www.edcorusa.com/products/638-xp ... 0-120.aspx
Hammond 276X, 376X, 260J, 260K
Antek AN2T350, wire the two secondaries in series, works great, bargain priced, but no 5V, so you'll need to find a way around that http://www.antekinc.com/details.php?p=59
Just about any 340-0-340 in the ~200mA range should do the job nicely.

I'll leave the OT's to someone else. The OT choice is much more subjective and connected to the tone of the amp. Both Edcor and Hammond have suitable OT's. Also look at the usual suspects Mercury, Heyboer, and don't forget Musical Power Supplies.

[tubeswell]

For a '5E3' circuit for 2 x 6L6s, any PT with a minimum of 150mA on the high tension winding, and a minimum of 2.7A to 3A on the heater winding (depending on the current draw of your lamp). Get a 3A recto winding and you have more to experiment with.

Any OT with a Pr Z between 3k2 and 6k6 - higher reflected load will give more output power (and lower will be 'cleaner' and jazzier).

[boldaslove6789]

Thanks Guys

[lumox0013]

Ive been wanting to try these out the price is right.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

[ToneMerc]

Ive been wanting to try these out the price is right.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

Not really for a far east second

TM

[KT66]

In one of the threads that Doveman posted about his Richter Supra-luxe he stated that the PT was a 325-0-325 200mA - like a Super Reverb style I suppose. The clips he posted sounded pretty good, seems like the VVR might be a worthwhile addition to your build. Here's one of the threads about it : https://tubeamparchive.com/viewtopic.ph ... =supraluxe

I haven't tried the MC trannys yet, but they seem to be getting a favorable reception, and you can't beat the price. This one seems like a good match for your project : http://classictone.net/40-18006.html

Happy building

[Structo]

Ive been wanting to try these out the price is right.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

That PT doesn't have enough current on the HT or the heater supply.

For example, my 2 x 6L6 D'lite amp has three 12ax7's and the HT is rated at 300ma.
The heater supply is rated at 6 amps.

[ToneMerc]

The filament and rectifier taps are stock correct for that model of transformer, it's the HT winding thats 80-90mA too low. This is why I called it a "second" and far east because it's the cheaper version that's made in Taiwan. It's cheaper than normal for a reason.

It would be ok for a pair of 6V6 or El84s around 15-18 watts or so. The portion of that ad pertaining to a quad of any OT tube type is just plain......

Caveat Emptor

TM

[KT66]

Ive been wanting to try these out the price is right.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

That tranny is the made in Taiwan version of the New Sensor Super Reverb/Tweed Bassman replacement. If you look at the data sheets for 2 X 6L6GC in push/pull : http://tdsl.duncanamps.com/show.php?des=6L6GC you will see that the max current draw is a tad over 230mA @ 450 Va - add in 36 mA for 6 preamp tubes and it looks like a unit that provides 265mA of current, almost twice what the NS unit is rated for, is what is needed for it's intended application. It must be ok for that though, that's what they sell it for. That's not unusual though, the CE equivalent and the Hammond SR replacement are rated at 200mA. The Mojo Heyboer version of the same one is rated @ 250mA which seems to be the most honestly labeled one out there.

Anyhow, my point is that when choosing a power transformer for a guitar amp that if the unit is intended for a specific model of guitar amp that it is best to look at the circuit that it is designed for and draw your own conclusions about how much current it has on tap. I do agree with Tone Merc though that I would much rather have a US made unit than an Asian one.

As for the 5E3 with 6L6s, using cathode bias results in lower power output and lower max current draw ( around 20% or so I think) than for the same plate voltage in fixed bias so for that circuit you are probably fine with a unit that actually is 200mA.

The MC SR tranny might be a good one to use because it has dual secondaries so you could try it at both or make it switchable : http://classictone.net/40-18029.pdf

Oh, and someone needs to tell that Ebay doofus that that the voltage is too high on that unit for el84s and that it can't run a quad of anything, let alone EL34s.

[boldaslove6789]

The MC SR tranny might be a good one to use because it has dual secondaries so you could try it at both or make it switchable : http://classictone.net/40-18029.pdf

Thanks, I think that's the one I'll use.

[lumox0013]

I had to come back to this as I'm about to embark on a new project .I'm starting work on my jcm 800 2204 but I want to use a pair of 6l6s,but all the trannys I could find the specs for(mag comp,mojo,weber) were running 150 ma,will this work out for 6l6s and why is this circut run on so low a rating.can someone help me understand this .another anomally is Ive seen doc's with the choke on this amp at 3hnrys,10henrys and 40henrys does it matter as long as it is 120ma and which do you think would be best with the 6l6s.many thanxx for any insight you can throw my way.

[Cliff Schecht]

150mA is fine for 6L6's if you have a high enough plate voltage to keep the requisite plate current down. The lower the plate voltage, the higher the current for a given bias condition. At typical 400V+ guitar amp levels the 6L6's won't be drawing over probably 60mA per and 30 mA is more than enough to keep a Deluxe preamp happy.

[dynaman]

FWIW, I contacted that Ebay seller about the same tranny about a month ago in regards to the HV secondaries. His response was: "Hello, the 700VCT must be at 140ma output. With 121v input, I measured something like
390+390V with no load. Thanks, Joe."

[lumox0013]

thanxx guys sounds like Im safe the tranny Im starting with is an edcore which are rated at 150ma with load.sounds like the 2204 rides right on the edge of what it needs.thanxx again for the help