Edcor OT spec ideas needed

[Wrongdog]

I talked to Phylis at Edcor about building OT's for us amp builders. They are aware of the demand out there but wanted to know what to build. They build very nice transformers and they should be checked out if you are not aware of them.

EDCOR - Browse Catagories

The GXPP and GXSE are ther guitar amp offerings. You will find they offer 5k and 8k primary with secondary of 4, 8, and 16 etc ohm secondaries in varying watts in SE and PP types now. The primary of 6.6K is missing in there line up.

I told them they need to build OT to the Fender tweed BF, Marsahll 18 watt and Ax84 Home Brew builders market which are based on the smaller tubes usually - 6v6 and EL84s

What do "we" want?? I think 6.6k in 10, 20, 30 watts with 4, 18, 16 or multi taps secondaries. 6.6k is optimal right? They want to see what we want and they may offer them.

I am not technical enough to be advising them but they want me to email them back with the info. What do you think????

[Gregg]

I think 6.6k in 10, 20, 30 watts with 4, 18, 16 or multi taps secondaries. 6.6k is optimal right?

4, 18, 16 and taps are ok but 6k6 is not optimal neither for small tubes nor for the big ones.

[Wrongdog]

I was under the impression that the primarary in all the small fender amps - Champ to DR were 6.6k.

I am pretty sure about that for the DR. Were Champs 5k or 8k depending on BF or SF?

So then what is is optimal:

SE: el84 and 6v6 use

PP el84 and 6v6 use ???

IS 5k better than 8k for a PP in case you wanted to use 6l6's ???

Allen Amplifications Champ OT is 8k, the upgraded one is 5K and Ned's at Triode is 5k...

I need one for a SE Hot Rod Champ type harp amp and a Cal Dreamer type DR 6v6 PP guitar amp project. I am guessing 5k for the Champ but haven't a clue for a DR -5k, 8k or 6.6k.

The Edcors are a great price. I like to try different stuff but maybe I should just go with the Allen - Heyboer's. Maybe I am making too big a deal out of this. I wish I had the time to learn all this stuff. I truely appreciate all that you folks know around here!

[tedmich]

I put this post in the wrong forum so I am re-posting. Sorry!

I talked to Phylis at Edcor about building OT's for us amp builders. They are aware of the demand out there but wanted to know what to build. They build very nice transformers and they should be checked out if you are not aware of them.

EDCOR - Browse Catagories

The GXPP and GXSE are ther guitar amp offerings. You will find they offer 5k and 8k primary with secondary of 4, 8, and 16 etc ohm secondaries in varying watts in SE and PP types now. The primary of 6.6K is missing in there line up.

I told them they need to build OT to the Fender tweed BF, Marsahll 18 watt and Ax84 Home Brew builders market which are based on the smaller tubes usually - 6v6 and EL84s

What do "we" want?? I think 6.6k in 10, 20, 30 watts with 4, 18, 16 or multi taps secondaries. 6.6k is optimal right? They want to see what we want and they may offer them.

I am not technical enough to be advising them but they want me to email them back with the info. What do you think????

Edcor has crazy value for the price; don't tell them to charge what Hebor of MM do!!

For the tiny amp crowd you'd need a very high primary resistance: 10k-24k and a few secondary taps, 8 and 4 as few people run a 16ohm 4x12 cab off a Firefly....

Versions of the Hammond universals 15 watters would cover most anything from EL84s to 61Np; 125e and 125ese but with some more iron and the nice blue bells, they'd sell themselves!

[Wrongdog]

Yeah, the blue bells in the CX series are VERY cool looking. You know - for when you drop your pick and you look up the skirt to check the tube glow of your bitchin' home brew!! Or in my builds - make sure nuthins' burning...

[Gregg]

I was under the impression that the primarary in all the small fender amps - Champ to DR were 6.6k.

I am pretty sure about that for the DR. Were Champs 5k or 8k depending on BF or SF?

So then what is is optimal:

SE: el84 and 6v6 use

PP el84 and 6v6 use ???

IS 5k better than 8k for a PP in case you wanted to use 6l6's ???

Allen Amplifications Champ OT is 8k, the upgraded one is 5K and Ned's at Triode is 5k...

I need one for a SE Hot Rod Champ type harp amp and a Cal Dreamer type DR 6v6 PP guitar amp project. I am guessing 5k for the Champ but haven't a clue for a DR -5k, 8k or 6.6k.

The Edcors are a great price. I like to try different stuff but maybe I should just go with the Allen - Heyboer's. Maybe I am making too big a deal out of this. I wish I had the time to learn all this stuff. I truely appreciate all that you folks know around here!

I'm sorry I'm not into Fender amps at all - not my cup of tea.
By optimal I meant the average 50 and 100 Watt amp.
I think a 50 Watt OT with 4-4k2 primary and one with 3k2-3k4 primary will cover most 50 watt amps. Then one 100W OT with 1k7-2k will cover most 100W amps.

[gldtp99]

I think "we" want quite a wide variety of iron---- i know i build many different types/sizes of guitar amps for different applications.
I've noticed that Edcor has updated their website with many more OT options as "stock, no extra $$$ to build"----- this is Excellent !!!
Now they need to do the same for the Class X PT's and offer some with 5V, 2 or 3 amp tube rectifier heater secondary windings for the smaller amp builders who desire to build with 5Y3, GZ34, and 5U4GB tube rectifiers, for example.
Also PT's for 100+ watt amps---- say 350-0-350VAC @600mA HT winding and a 6A 6.3VAC center tapped heater winding for a solid 100+ watts and something a little smaller for @100 watts.
I've used Edcor trannies in a few builds and they've worked well---- PT's run quiet and cool and deliver rated specs----- the OT's have a wide bandwidth and sound good.
Here's a clip of a '74 Orange OR80 copy (modded tonestack and EL34 x 2) i built with an Edcor 100 watt OT with a 4.2k primary (was a custom order at the time--- now it's offered on the website)--- Click on "Mule OD80" -- SoundClick artist: gldtp99 - page with MP3 music downloads
I also built a Hiwatt DR103 clone with Edcor PT and OT (custom spec PT and their stock-at-the-time 100 watt 2k primary OT)---- the owner has been gigging happily with this amp for well over a yr now and loves it

[hasserl]

Hmmm, I've just been emailing Phyllis about an OT for a Musicmaster Bass amp. I'm looking for a higher output trans with the same center to center distance as stock (2.82", same as many other amps, like the Princeton/Princeton Reverb, 5E3, etc), she didn't seem too interested in hleping me. Couldn't be bothered with more than two or three word replies, didn't have what I was looking for and didn't seem interested in trying. I had heard good words about them, but that left me dissapointed.

I understand if they don't have the part, but showing a little interest with a sales prospect goes a long way, pretty basic salesmanship 101.

[Wrongdog]

I never got a response on an email query but she talked to me for almost 15 minutes and was very interested and responsive. She admitted she is TOTALLY over whelmed by business and that she was not able to keep up with e-mails. Give her a call instead.

I am a Realtor and all the e-mail stuff leads to little or nothing where as a phone call with REAL communication (or ideally a face to face) has much better results. Be it information or a sale.

[gldtp99]

I just checked the Edcor website and they have updated the PT's available----there's a wide range of PT's listed now----- smaller PT's with 5V taps and even a 450mA monster for the 100 watt amps----- and many choices in between.
They always would make almost any transformer a person could spec, for a $$ premium, but now they have a wide range of choices available without the "custom $$$-wind" price premium.
I'll be ordering soon...................gldtp99

[tedmich]

I think "we" want quite a wide variety of iron---- i know i build many different types/sizes of guitar amps for different applications.
I've noticed that Edcor has updated their website with many more OT options as "stock, no extra $$$ to build"----- this is Excellent !!!
Now they need to do the same for the Class X PT's and offer some with 5V, 2 or 3 amp tube rectifier heater secondary windings for the smaller amp builders who desire to build with 5Y3, GZ34, and 5U4GB tube rectifiers, for example.
Also PT's for 100+ watt amps---- say 350-0-350VAC @600mA HT winding and a 6A 6.3VAC center tapped heater winding for a solid 100+ watts and something a little smaller for @100 watts.
I've used Edcor trannies in a few builds and they've worked well---- PT's run quiet and cool and deliver rated specs----- the OT's have a wide bandwidth and sound good.
Here's a clip of a '74 Orange OR80 copy (modded tonestack and EL34 x 2) i built with an Edcor 100 watt OT with a 4.2k primary (was a custom order at the time--- now it's offered on the website)--- Click on "Mule OD80" -- SoundClick artist: gldtp99 - page with MP3 music downloads
I also built a Hiwatt DR103 clone with Edcor PT and OT (custom spec PT and their stock-at-the-time 100 watt 2k primary OT)---- the owner has been gigging happily with this amp for well over a yr now and loves it

Egads! OT and PT NOT perpendicular! for shame!!

kidding, was coupling not an issue or were you just into aesthetics? It does look fantastic!

[Wrongdog]

Wow! Purdy and I bet pretty serious sounding.

I am thinking I am not the one to be talking to Edcor since I am pretty much a newb. My most complicated build is a Bedrock Royale Reverb. I really don't know what I am talking about when it gets technical. I was thinking they could cater to the AX84, 18 watt clone crowd and offer some alternatives.

[gldtp99]

Egads! OT and PT NOT perpendicular! for shame!!

kidding, was coupling not an issue or were you just into aesthetics? It does look fantastic!

I laid out this Hiwatt-type amp much like a real Hiwatt----
here's a pic of a Hylight Hiwatt DR103 that i used to own


The iron isn't perpendicular on the factory Hiwatts and they (and the clone w/Edcors) don't suffer from noise problems...........gldtp99

[tubeswell]

For a universal PP Fender type OT, how about an OT with an 8K primary & 8R, 9.2R, 9.7R, 12.8R, 16R, 20R and 25.6R secondaries rated at say 25W?

With an 8R speaker you could get 8k on the first tap, or 7k in the next, or then 6k6, 5k, 4k, 3k2, and 2k5, and it would be good for either 2 x 6V6s or 2 x 6L6GCs. Not necessarily ideal for every amp, but close-enough for use with a lot of tweed, brown or BF.