ODS Reverb pics!

[ElectronAvalanche]

Hi gang,

here are some pics of my ODS 75W Reverb clone..... using two KT88 (504V on the plates).

As said, it features a Post PI CF and 2 Tube Reverb switchable HRM and Non-HRM.

I still have some minor issues concerning the Reverb.

I think I will go back to the 100k/1k5 anode/cathode resistors in the Reverb Recovery and rather drop signal to ground. I now have 22k/820 and 47k/820 and have some 3-3.6mA through the 12AT7.

[img:600:400]http://www.dominik-termeer.de/75WODSIII.jpg[/img]

[img:600:900]http://www.dominik-termeer.de/75WODSII.jpg[/img]


[img:600:400]http://www.dominik-termeer.de/75WODSI.jpg[/img]

[pedro]

thats beautifully crafted - bet it sounds wonderful.

I tend to use old chassis to build experimental circuits and then if it sounds great I never get round to building the cosmetic version - sometimes I even gig with the ugly beasts - shame on me.

I need to get round to building the "finished article." Once the tone is there I lose the will to do the craftmanship - unless I'm building for a friend or fellow player.

nice to see your using same RIFA caps as me in the PS !!

I'm about to rebuild a DIY plexi into a dumble ODS so I'll use your build quality as a source of inspiration and I think I wil try the CF idea - like the echoplex etc.

cheers
Pete C

[jazzyjoepass]

Woah ... That's the work of a master !!!

Pure beauty ...

[oldmacman]

That is some fine construction!

Bet it sounds as good as it looks. Let's hear some clips!

[ElectronAvalanche]

Thanks for the kind responses!

Clips will have to wait until I get that Audio Interface and SM-57 from our rehearsal room.


I redid some bits of the Reverb section (moved another ground point) and setting the Dwell trimmer lower got rid of all the Reverb problems.

I will post a new pic later on.

Cheers,

Dominik

[ElectronAvalanche]

So here is the pic of the board update. I moved the Reverb Driver cathode resistor/cap to another place and shuffled the mixing resistors around a bit.

If you do intend to build a Reverb clone, I would urge you to completely seperate the Reverb grounds from the OD/Clean grounds. Run the Reverb grounds to the corresponding filter ground and from there to the filter star ground.

Cheers,

Dominik

[Bob-I]

Very nice work.

Did you make the PCB for the PS yourself? That's on my list of things to learn, PCB making.

[Normster]

That's great looking work, Dominic. Very efficient use of limited space. Your PCBs also look professional. You may have to give us all a lesson in PCB making.

[ElectronAvalanche]

Hi there,

thanks again for the kind words.

The PCB were done by a friend of mine (Ulrich Rodenberg of Flexamp.com). He builds some very nice amps and also used to sell the "Flexloop" which is sort of a Dumbleator.

Cheers,

Dominik

[tonelab2]

WoW, well done. beautifull work. Looking forward to clips.

[Tdale]

I see there are 6 small tubes.

Preamp, OD, 2xreverb, PI

but what is the last one for?

Tommy

[ElectronAvalanche]

Hi Tommy,

it is a post PI CF driver for driving the "shit out of" the 2 KT88

Cheers,

Dominik

[pedro]

Dominik,

I have a spare tube in my latest ODS build - is it worth trying the post PI CF into 6L6's ??

what do you think ?

Pete C

[mobisimo]

The pics are busted ... does anyone have them backed up?

[mobisimo]

They're back! Thank you!