Cressy Snr wrote: ↑Tue Apr 21, 2020 6:45 pm
I have it running El34s at the moment to good effect.
Well I had to do it, just to satisfy my curiosity, so I tried the Decware, Hazey Jane grid mod with a 0.1uF Orange Drop cap between pin 1 and pin 8 instead of a straight wire. I’m damned if I can hear what it’s supposed to do. Maybe I’m not; never have been, an audiophile.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Had a bit more time to listen to the amp with the cap installed between suppressor grid and cathode. There may be some AC tomfoolery going on here, ie I seem to have a nice pleasant distortion generator, something like the WE harmonic equalizer?
It’s an interesting and certainly not an unpleasant effect, but I’m damned if I can describe it apart from it being ‘big‘ sounding. Whether it’s hi-fi is debatable.
Last edited by Cressy Snr on Thu Apr 23, 2020 8:50 am, edited 1 time in total.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
As usual, I’m ten years behind the curve on this distortion generating business. Are folks still doing the harmonic equalizer thing or has its time passed.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Interesting find Steve. Goes to show everything that glitters.. and all that
I've always built straight forward traditional amps when it comes to coupling & valve operation.I've yet to have it proved there's a better way.. yet ?
The tube manual is quite like a telephone book. The number of it perfect. It is useful to make it possible to speak with a girl. But we can't see her beautiful face from the telephone number
steve s wrote: ↑Thu Apr 23, 2020 10:37 am
Interesting find Steve. Goes to show everything that glitters.. and all that
Decware owners seem to love it. It’s probably a cult thing, like the Linn/Naim/Flat Earth was.
I can sort of see why they like it. Whether it’s viable, long term for me is another matter entirely.
As for the sound: think of being back in the early 60s, the smell of a roast beef Sunday dinner cooking. You’re sitting facing four big radiograms. Family Favourites is on, and the radiograms are all playing Nat King Cole, singing ‘The Very Thought Of You’ with the Gordon Jenkins Orchestra and you’ve got the general idea.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Dead simple, two power supplies and a simple audio circuit. Pretty really but it’s surprising what you can get out of a back-to-basics approach, but we know that already don’t we
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Got bored with the Hazen grid mod. I gave it a fair hearing, but it’s a coloration; present on everything you play and has a homogenising sepia tone effect on the music. Annoying in the end...it’s not real.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Hi Steve looking at your schematic your not showing any series resisters. The ez81 should have 2x 230ish ohms inc the transformer windings.. Of course you may have that in the windings.. If so forget my comments
Cheers
The tube manual is quite like a telephone book. The number of it perfect. It is useful to make it possible to speak with a girl. But we can't see her beautiful face from the telephone number
steve s wrote: ↑Mon Apr 27, 2020 11:49 pm
Hi Steve looking at your schematic your not showing any series resisters. The ez81 should have 2x 230ish ohms inc the transformer windings.. Of course you may have that in the windings.. If so forget my comments
Cheers
Hi Steve, both power supplies are choke input. The limiting resistors aren’t mentioned for either the GZ37 or the EZ81, when they are used with choke input filters.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
really but it’s surprising what you can get out of a back-to-basics approach, but we know that already don’t we 
