2 x 12au7 amp running on 9 volt adaptor and smps

[zambo]

before you buy a ot check this out.  http://tdsl.duncanamps.com/show.php?des=6V6GT     so at 180 volts its only drawing 32ma at idle? do i have that right? You could have a 2 watt 6v6 amp running on a smps instead! I have a 6k6 now and I really like it I may change it to a 6v6 instead as it draws less ma and seems like I would get more bang from it. I am trying to figure out if we could run 2 in parallel for the same voltage but double the ma. them we could run 2 6v6 in se mode. small and LOUD. 

[iccaros]

That is the same tube that is in the Fender champ (silver face)
It is a tough tube, fender runs them close to 300V... the JJ version is rated to 500V..

It is rated for 12 watts..

but @ 180 volts and  .03 amps is close to  5 1/2  watts.   

[iccaros]

@ zambo

Where did you get 400K 5 watt resistors?

[zambo]

its a surplus store in santa rosa ca. electronics plus in san rafael ca. sells them and they ship as well if you need to order. they are pretty fast as well. kinda pricey for some stuff but no minimum order so thats cool.

[iccaros]

its a surplus store in santa rosa ca. electronics plus in san rafael ca. sells them and they ship as well if you need to order. they are pretty fast as well. kinda pricey for some stuff but no minimum order so thats cool.

I know what I was doing wrong, I fixed the schematic.. I had 400k not 400  ohm..  Let me tell you 400K 5w are rare.. 400ohm 5 watt not so much..

[zambo]

haha... good catch, i missed that one. yeah 400 ohm is gooder

[El Heisenberg]

before you buy a ot check this out.  http://tdsl.duncanamps.com/show.php?des=6V6GT     so at 180 volts its only drawing 32ma at idle? do i have that right? You could have a 2 watt 6v6 amp running on a smps instead! I have a 6k6 now and I really like it I may change it to a 6v6 instead as it draws less ma and seems like I would get more bang from it. I am trying to figure out if we could run 2 in parallel for the same voltage but double the ma. them we could run 2 6v6 in se mode. small and LOUD. 

!!!!! If I had all this stuff you guys have just layin around to play with, I'd have tried that 5 minutes before I posted that message!

I hope you do try that out. I already have a buncha 12au7s, and I ordered the SMPS a day or two ago. How long did it take to ship? I didn't get a confirmation email or anything just a paypal receipt.

Anyway, I don't have the output transformer yet. Im about to build 5 pedals in a row for a friend and I get to order a few extra parts for myself, I was thinkin of just spending it all on the output transformer...

But should I wait till Zambo tries this?? Id need a different output tranny. 2 X 6v6s!!!

[iccaros]

before you buy a ot check this out.  http://tdsl.duncanamps.com/show.php?des=6V6GT     so at 180 volts its only drawing 32ma at idle? do i have that right? You could have a 2 watt 6v6 amp running on a smps instead! I have a 6k6 now and I really like it I may change it to a 6v6 instead as it draws less ma and seems like I would get more bang from it. I am trying to figure out if we could run 2 in parallel for the same voltage but double the ma. them we could run 2 6v6 in se mode. small and LOUD. 

!!!!! If I had all this stuff you guys have just layin around to play with, I'd have tried that 5 minutes before I posted that message!

I hope you do try that out. I already have a buncha 12au7s, and I ordered the SMPS a day or two ago. How long did it take to ship? I didn't get a confirmation email or anything just a paypal receipt.

Anyway, I don't have the output transformer yet. Im about to build 5 pedals in a row for a friend and I get to order a few extra parts for myself, I was thinkin of just spending it all on the output transformer...

But should I wait till Zambo tries this?? Id need a different output tranny. 2 X 6v6s!!!

A good line transformer would also work for SE.. It may saturate as there is no air gap.  but this is PP so that would not matter, its would require figuring out the taps.. Parts express has 10 and 15 watt for $5 - $8, I would have to review what others have taught me and get an answer.

[zambo]

I tried the two 1363 smps in parallel and it hetrodynes so, no love on that one.....the single 6v6 with one smps works though and its a good 2 watts says duncan amp pages. I am still going to try it. I have the 6k6 amp but i neeed to rebuild it. it was one of my first amps and could use some tunning up and have some new tricks applied. As far as output trans goes. get athe biggest one you can afford within reason and with variable taps. you will always reuse it in something it seems.

[El Heisenberg]

Eh, I'm gunna wait for iccaros to do the experimenting before I make a purchase. I don't have the stuff lying around or the resources to just buy stuff I ain't sure will work/



I really want this design to be done!!


I orderd two of the SMPSs for some reason...

[iccaros]

I have parts on order, but work Travel and my Masters program may push this back.. I do not have enough 12AU7 so I was going to try with 6111, I know Frequency Control already did a firefly with 6111, but this is a Push Pull Parallel firefly.. I have to look at what he used for a OT..  If I have to buy an OT it will be a few weeks...

[El Heisenberg]

Or maybe zambo. He brought up using the 6v6s

[Perrow]

I have parts on order, but work Travel and my Masters program may push this back.. I do not have enough 12AU7 so I was going to try with 6111, I know Frequency Control already did a firefly with 6111, but this is a Push Pull Parallel firefly.. I have to look at what he used for a OT..  If I have to buy an OT it will be a few weeks...

The Superfly (6111, 6112 Firefly) uses a Hammond 125A ot, building one right now.

[iccaros]

I have parts on order, but work Travel and my Masters program may push this back.. I do not have enough 12AU7 so I was going to try with 6111, I know Frequency Control already did a firefly with 6111, but this is a Push Pull Parallel firefly.. I have to look at what he used for a OT..  If I have to buy an OT it will be a few weeks...

The Superfly (6111, 6112 Firefly) uses a Hammond 125A ot, building one right now.

then I will have to wait... hard to do 22.5K to 8 ohms with a line transformer.

I may just build the Squirrel Monkey

[zambo]

I may end up using two smps one for pre and one for power. I will use split supply and caps etc. I hope it doesnt hetrodyne again. thats annoying. I muy run 3 12au7 in the power section though. will have to see if I can run that much ma with the 9 volt walwart. may have to use a 16 volt...hmm....the fun of it all 

[frequencycentral]

I may end up using two smps one for pre and one for power. I will use split supply and caps etc. I hope it doesnt hetrodyne again. thats annoying.

Which of Mother Nature's immutable laws are you planning to change? 

[El Heisenberg]

I plan on using a 12v 1A transformer. More current from the power tranny the better?

[iccaros]

I may end up using two smps one for pre and one for power. I will use split supply and caps etc. I hope it doesnt hetrodyne again. thats annoying. I muy run 3 12au7 in the power section though. will have to see if I can run that much ma with the 9 volt walwart. may have to use a 16 volt...hmm....the fun of it all 

I'm behind  you..

[El Heisenberg]

3 12au7s??

I just want as much volume as possible. So I'm still gunna wait till this developes more. Besides, I still don't wanna shell out that much money for one freakin part. The output transformer. Seems like alot of money for so few watts. A chip doesn't need an output tranny. 

I'm starting leaning towards just getting some 6v6s and tryin to go that route... alone??

[Perrow]

This might be neither practical or possible, but (in theory) couldn't you use two line transformers "in series"?

There'd sure be some efficiency loss but it could work.