bernbrue

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #240 on: July 13, 2015, 02:45:39 AM »
Stunning! Your productivity is unbeatable. Have you got the time to use your gear? Excellent!
Bernd


djfatum

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #241 on: July 13, 2015, 02:55:09 AM »
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  ;D
« Last Edit: July 13, 2015, 02:59:46 AM by djfatum »

andre tchmil

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #242 on: March 25, 2017, 07:59:59 PM »
leaving out the bias meter ( 1mA) what should I put in place ?

petermontg

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #243 on: July 04, 2019, 07:07:09 PM »
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

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #244 on: August 31, 2019, 10:18:02 AM »
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

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #245 on: October 07, 2019, 04:52:03 PM »
Beginning my build finally. Front panel loaded. Boards are loaded. Just have to wire. ???

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #246 on: November 26, 2019, 01:26:02 PM »
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  ;D

Bobby Baird

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #247 on: December 23, 2019, 11:08:19 PM »
Guts.

Bobby Baird

Re: The Rude Tube Build / Support Thread (MAJ + PSU)
« Reply #248 on: December 23, 2019, 11:08:52 PM »
Cinemag.

Bobby Baird

« Last Edit: January 14, 2020, 10:46:49 PM by Bobby Baird »


Bobby Baird

Re: The Rude Tube Build / Support Thread (MAJ + PSU) New
« Reply #250 on: January 22, 2020, 01:23:55 AM »
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.
« Last Edit: January 25, 2020, 02:41:02 AM by Bobby Baird »


 

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