got this today

[tsutt]

its a guild bonnet box amp phono receiver unit. separate amp. the tone stack which looks to be active is in the receiver box. attaching the original schematic, if i do it right. ef86-12ax7-4 el84's

[tsutt]

heres a couple pics

[xtian]

Ooh, that's quality antique. Nice looking components. Go, rocket boy!

[Structo]

Nice!

What are your plans for it?

[M Fowler]

That's a nice start for a Stangray or AC30.

[tsutt]

Well of course a guitar amp of some take. Just not sure what flavor fits best yet. Any ideas what fits best? I dont know what a stangray is. I was thinking ac 30 or rocket type of course it's got an ef86 up front.

[M Fowler]

Dr Z Stangray has an EF86 V1, 12ax7 V2, 4 EL84's power section and GZ34 rectifier tube. Volume, tone and cut control.

The AC30 would be a great build as well and something I would love to tackle one of these years.

Mark

[tsutt]

Mark is there a schematic for a Stangray around on here? This thing currently has a "hum balance" it's called on the heaters???

[Structo]

That balances the heater current to the tubes to reduce hum.
You just adjust it for the lowest audible hum.

[tsutt]

Hey, Thanks.

[ampfab]

that's a nice specimen!
check out the ef86 preamps at ceriatone, like this one: http://www.ceriatone.com/images/layoutP ... iatone.jpg I like the coupling capacitor switch. i believe it was lifted from a vox ac15.

[tsutt]

yes i have that already, my instructor has a matchless clubman that had a 6sh7 but it was converted to an ef8r by the factory. which was a mistake. anyway it still sounds great.

[tsutt]

Could one of you smart guys look at the schematic in my first post in this thread and tell me whats going on with the 2 point taps to pins 7 and 9 and the 100 oms r at pins 2 This was a phone, receiver amp. I know not the same just curious.

Thanks
Todd

PS. got merlins book painfully slow reading for me but its starting to soak in.

[M Fowler]

7 is your output transformer regular primary taps.

9 is your ultralinear taps.

2 is 100R screen resistors.

[tsutt]

what does the ultra linear affect. Just trying to learn. So i apologize if im a bother this way.

Thanks mark