Someone has a 6BM8 (ECL82) SE Amp (turret or Eyelet Board) Layout to share ?

[kagliostro]

I want try to plan a Turret Layout for the Gibson GA-5T Skylark '61 (5Y3GT - 6BM8 - 12AX7)

and .... as it is more easy to plagiarize than to invent I'm looking for a Board Layout of a 6BM8 based SE Amp

to be used as a start point to plan the GA-5T Skylark Layout

Thanks

Franco

[VMS]

Good pictures here, text says EL-84 power tube but if you look at the pictures the power tube is clearly ECL82


http://truevintageguitar.com/inventory/1960-gibson-ga-5t-skylark-tremolo/


hope this helps

[kagliostro]

Many Thanks VMS

I've also some other photo of the original, one very good



However I'm thinking to a new layout (not an exact clone), one where all components are on the board

so I was hoping to find a Board Layout of any amplifier that uses 6BM8 as to be used as a base

the photo I've is very good, but some parts of the connections are unreadable

--

Meanwhile I've find this GA-1RVT Layout that isn't the best option but I can use if I don't find other better option



Franco

[VMS]

It's probably difficult to find layout with same tremolo. Here is one more gut shot of ga-1rt amp that has same ecl82 section. It shouldn't be too hard to make a layout comparing all these pictures you have now.


https://reverb.com/item/2278257-vintage-1961-maestro-ga-1rt-reverb-echo-tube-amp-gibson-made

[kagliostro]

Good inside photo 

Thanks VMS

Franco

[VMS]

Little off topic and don't remember if i have talked about this before but a while ago i was thinking that amp using only 6bm8 tubes could be a fun project. I draw this schematic then using preamp from svetlana datasheet, vox type tone stack and power amp from dynacord kv10.

[kagliostro]

Ciao VMS

I'm not sure about, but to me seems you or one other guy posted something similar some time ago

Franco

[VMS]

might have been me, i don't remember what i post here half the time 

[MFowler]

In the Hoffman .sch library there is a GA-5T layout and schematic. Also two more that say with mods.

[kagliostro]

 

I didn't recognized that there was a Layout on the .sch library

Many Thanks MFowler

I'll give a look also to the other versions with mods

Franco

EDIT:

Also two more that say with mods

I need help, I'm not able to find where are those files  , can you post the link to the page ?


I discovered I've all those file  on my archive since some years ago  , but I'm not able to find them on the site pages

[MFowler]

Yes some more that say mods GA-5T

[kagliostro]

Thanks for the files, but where they are in the forum ?

Franco

[MFowler]

The ones I uploaded were in my Hoffman files on my computer collected over the years.


I tried to find them on the Forum but could not locate them.


Mark

[sluckey]

LOOK...

http://el34world.com/Forum/index.php?topic=3783.msg33774#msg33774

[kagliostro]

Many Thanks Steve

---

Some time ago (may be years) there was a compressed file with the .sch library of schematics

seems that it is no longer present on the forum

Franco

[svejkist]

I want try to plan a Turret Layout for the Gibson GA-5T Skylark '61 (5Y3GT - 6BM8 - 12AX7)

and .... as it is more easy to plagiarize than to invent I'm looking for a Board Layout of a 6BM8 based SE Amp

to be used as a start point to plan the GA-5T Skylark Layout

Thanks

Franco

Here is a GA-1RT-1 layout with a few mods (SS rectifier, LED oscillator bias, some values, no vestigial reverb).

[kagliostro]

Many Thanks also to you Svejkist

do you know the origin of that layout ?


Franco

[svejkist]

I drew it years ago. The second layout I ever did, so maybe not ideal. But the amps I built from it worked fine. I have the DIYLC file, but it wouldn't let me attach it here. If you want me to email it, PM me.

[kagliostro]

Thanks for the answer

Not to refuse your offer, but what you posted is enough

Franco

p.s.: To solve problems about files that are not allowed to be post, compress it and post the compressed file

[svejkist]

Thanks, I wondered if that would work, but didn't see zip, gz etc in the allowed file types. Could probably also just change the extension.

[PRR]

> didn't see zip, gz etc in the allowed file types.

"Allowed file types: doc, gif, jpg, pdf, png, txt, zip, sch, jsch, xls, xlsx, csv, dxf, vsd, vss"