Not to mention NOS devices that are advertised as the best parts you can buy... how the heck ... after spending 30 years in a storage ... not that is an affirmation full of sh%$
And no ... other then tubes (because i do have quite a stash) i'm not using NOS components.

Regards,
DeX

And a very nice and constructive discussion started here. I would like to thank Emu for taking the time to post a lot of valuable info even if it is in the neuro domain (not a problem with that because ... i do think that all variables must be taken into consideration). At last but not at least ... ...

Nope ... totally random and i do think that one of them is a CHN knockoff

mojah63 wrote:Yawn... These type arguments have been going around forever. It wasn't that long ago people were arguing over capacitor dielectrics.. Are all the opamps from the same manufacture too??

@Emu2 - 300mVpk wich is quite a good average of a guitar signal (not talking about active pickups .. etc). - I do not push anyone NOT to experiment :) as I said ... you don't know me but i'm all for experimenting and alternative solutions :) so again (maybe i wasn't clean from the first time): i'm n...

@Emu2 - all what you said is correct, but as you might see in the video ... the gain (and actually all the controls) were at 12oclock ... i can't do tests for all the positions of the pots because ... i would end up very very very old....so ...i do guess it's quite a decent test environment at least...

@Emu2 - That AC "noise" as you can see was way under a relevant value. - Usually THD is tested @ 1KHz in industry if i'm not mistaken ... - Again i was talking about TS808 ... can you please tell me what influence can have an opamp that is using diodes in the FBK path that will clip at a m...

Thank you MoonWatcher for you post and as i inted to agree with you i would have to tell you that this test was made specifically for 808 - in other topology the differences between opamps might get into the equation. But i was talking strictly about 808 and derivations.

Regards,
DeX

@ppluis0 - yes is the original TS808 schematic with NO modifications added. Just a pure and simple TS808 - and yes that was what i was always said: the diodes will clip way before the opamp will (and yes there is way way more difference if you are going to use different diodes) @mictester - you are ...

I think i would have to buy them ... as i don't have them on stock... ...there is nothing that can justify spending 500USD on a TS808 that has a "vintage" 4558 inside. AGREE !!! But... I ask about AD712 or OPA2134 due the rumours that one of these models are used in the Hermida Zendrive. I...

Do you have a tool for that or ... do you have a test scenario in mind? But i doubt that for 13V/uS (for a TL072) and a 3MHz unity gain ... would make any difference in KHz domain :) But as far as i know this is how audio equipment is tested in terms of ... quality and performance. We can do that ne...

Thank you brother, but i would like to ask you when was the last time that you use AD712, AD8066, OPA2134, LM833 in a TS808 build when the original chip was 4558 and everyone is crazy about it. This video was not made to show differences between high-end opamps or instrumentation/high precision opam...

Hello guys, I've made a little experiment that was focused on differences between different types of opamps in TS808 like overdrive pedals. The experiment was focused on: - Harmonic content - THD - Freq. response Here you have the clip with the experiment, along with some screen shoots - i will answ...

This system was not tested with a battery. If you are using a small low power relay a battery could be used. When i design it / test it i was not thinking of that because all my pedals designs are not using batteries. Regards, DeX PS: this system was made as an alternative to a uControler system tha...

Hey guys, Just finished to bread-board the full tube / high-voltage tremolo and it sounds like this (very happy with the result i might say). The schematic was modified and an updated schematic will be available soon. If you like to jump directly to action you can go to min. 2:13 but if you like to ...

I'm selling my personal full-tube preamp unit. The unit was made for my personal use but i'm putting it out now. The price is the same as the one for a full kit 110USD + Shipping (around 10USD). Here are the features: - full tube construction with 12AX7 tube (the unit is delivered with TAD tube) - h...

Thank you for your reply Gordon. Quick question: what do you do with the other couple of millions of already build amps. This system (i'm sure that this is written somewhere) was designed and build for existing amps. And you can't use digital pots in tube amps :) Yes for a new design your solution i...

Hello guys, I'm working right now on a small system that will allow you to control a standard potentiometer using either MIDI or Expresion pedals. There is a lot of things to work on but i will present you the concept. The idea behind this was simple: a electro-mechanical module that can be used vir...

Hello Andy,
At the moment no PCBs are available. Only kits (full kits to be exact). But they should be available soon after the site / store will be ready.

Regards,
DeX

v0d00blues79 wrote:Are there any boards still available for this build? I'd love to try this circuit out!

Thanks,

Andy

And a small video clip - details in the video description

Finally i've found some time to finish an old project. It's an Alembic F2B preamp with some modifications made - the output section can be build with or without HV FET buffer. 12AX7 tube @ 320V anode voltage ( using my version of SMPS ) in a 1590BB type enclosure. Kits will be available soon, but fo...