Scryer ... or how F8 met Mighty SissySIT

[Plott]

She likes the Scryer very much... it's so nice warm
We have a very cold (8 °C) and rainy time (over 100 mm in just two days) so I totally understand her... but she knows it's not allowed...

 

[Zen Mod]

funny written Pass Labs on front

 

[Plott]

Sort of...

 

[myleftear]

That's the issue with multi turn trimpots. They need some periodic "exercise".

Is this some known behaviour (should I expect this too, someday?)

 

[william2001]

These things are not foolproof, as discovered by von Ah. An occasional "re-calibration" would be wise. I deal with them at work, and sometimes when the board hasn't been touched for a long time, you can feel the adjustment screw "pop" as you begin to turn it. On the most critical "failure not an option" circuits that have to be dialed in, a potentiometer (wired as rheostat) is used to determine the initial value, pot removed and measured, and a fixed high precision resistor of the nearest value installed permanently.

 

[Zen Mod]

Is this some known behaviour

hardly

Gremlins don't obey expectations

 

[poli]

nice one, Istvan!

 

[Plott]

Thanks Poli!

 

[Plott]

Listening session this evening with the Scryer... simply incredible. I have (for now...) only three class A amps, but this is without a doubt and hands down my favorite, period. I'm really thinking about building the amp again, this time with super duper premium components... it's that good 😍

 

[sp33ls]

I wonder how it compares to the mighty SissySIT

 

[Zen Mod]

SIssySIT is simply incomparable with anything else; it's more THD Generator than an amp

 

[Plott]

...and does it mean "better" or just "different", or even "matter of taste"? 🤔

 

[Zen Mod]

yeah
yeah
yeah

.......... or, as Matthew use to say

 

[Plott]

 

[poli]

...really looking forward to building that thing 🙂

 

[von Ah]

Scryer has been in the main system for over a week. I just spent an hour tweaking the bias and offset in both channels. All working well. 1A6 Iq and single digit mV offset. The values had not drifted far from when I last set it. Time for a listening session!

 

[Vunce]

Gotta love Scryer🤩
Almost time to get mine fired up.

 

[tonyEE]

SIssySIT is simply incomparable with anything else; it's more THD Generator than an amp

I found the XA252 SIT "Macho SIT", to sound better... deeper bass, lower noise floor, than the SissySIT

The 252SIT never sounds loud, it just sounds.

Unfortunately, the noise floor has a way of going all the way down, to like 0db sometimes.

So, the Sissy SIT is still King Of The Rack... hmm... Queen Of The Rack? Darn ZM.... could you have called it like TipTop Through The SIT instead?

Perhaps Macho SIT might become Macho SET?

We'll see now with the bridged F4s.... just need a couple of days. Burn them with cheap speakers first.

 

[von Ah]

New decal arrived.

 

[Zen Mod]

Fugly!