[bernbrue]

Stunning! Your productivity is unbeatable. Have you got the time to use your gear? Excellent!
Bernd

[djfatum]

Stunning! Your productivity is unbeatable. Have you got the time to use your gear? Excellent!
Bernd

So I have time to use :-)
I'm looking for another good projects 

[andre tchmil]

leaving out the bias meter ( 1mA) what should I put in place ?

[petermontg]

I came back to this project recently and did some more wiring and soldering.

I ran into a problem I think it could be around the EF86.

The unit doesn't pass audio.

When I play with the spare leg of the drive it gives me ground hum and lets me check the controls which function as intended. Tapping the tubes I can hear. Tapping solder joints  around the 86 I can hear but I don't think it's passing audio. I've tried with two different 86, same problem.

Everything is fine upto the 86.

What B+ voltage should I be reading on the 86 line?

Any insight or thoughts would be great. Am just scratching my head at this stage as there is not much in this to go wrong.

Best
Peter

[petermontg]

Audio passes now.

My main issue is that annoying fizz.

Is this an inherent characteristic of a poor 6as6.

I've grounded the hell out of this thing 😂

Best
Peter

[Bobby Baird]

Beginning my build finally. Front panel loaded. Boards are loaded. Just have to wire.

[xazrules]

Hi, thank you Bernbrue for this beautiful project, i've already build a mastering version and everything is fine.
now i'd like to convert it to use as a guitar preamp, with an ecc82 at the output the distortion seems to became smoother but at full blast with all the controls fully cw it'd like to go into oscillation but only when you play or specially when palm muting i've tried to place nfb here and there but i don't like it, someone can help to have high gain dist without osc? maybe less distortion post ef86 and more post 6as6? or maybe try a better ef86? or try make the ecc82 Ra (8k2)bigger? so having more distortion with less volume.
Thanks!

ps: i've tried positive feedback and it scream i love it but the downside is that you are playing thru a square wave synth too 

[Bobby Baird]

Guts.

[Bobby Baird]

Cinemag.

[Bobby Baird]

https://www.youtube.com/watch?v=lLQDYnfTGEU&feature=youtu.be

https://www.youtube.com/watch?v=KzM6vpOS97c&feature=youtu.be

[Bobby Baird]

Project is finished. Electro Harmonix input and output tubes with Mullard 6AS6's. Cinemag cmli-15/15b on input, and Cinemag cm-2810 on output. Sounds great to my ears. Really gives sounds that tube splat. Socketed all filter caps in the function section, so I can swap out caps to dial in peak filters. Added trimmers to r1, r11, r23, r28 to dial in tube stage gain to have even stereo image. Only real problem I had was one of the main boards had a lifted trace or something in the voltage divider  overdrive section. It was displaying a high passed sound. I had to end up solder jumping 2 resistors to get it to work full bandwidth.  Thank's again to everyone who contributed to the project.

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