idiot proof mono push pull 6l6gc schematic wanted

[costis_n]

lighten up will ya?

OK

 

[jasondace2b]

iam your huckleberry

wow i feel a little hostility. thats funny iam catching attitude over nothing iam going to use this one , and adapt it to 2 outputs instead of 4. i need more experiance with it. this circuit is my first unfinished synphony and i have about 1000 bucks tied up in it already. with a pair of these baldwin pc amps running 4 6550s a pair of martian rectifiers and 100 watt antek outputs.
prollly a little more than i could chew on for a first build, but God hates a coward. so i really dont feel like i qualify as a " johnny come lately", but i do realize that i dont know much. i have come a long way in 2 mos.

whatever fellas.....

 

[aardvarkash10]

so what stage is this one at? Is it gonig yet? (Or is it a donor?

 

[vinylkid58]

100 watt antek outputs.

AT-100L's? Pretty low primary impedance for a pair of 6550/kt88.

jeff

 

[jasondace2b]

so what stage is this one at? Is it gonig yet? (Or is it a donor?

this is not going at the moment. i had a a pair of these going for about a week. how i got into tearing into them again was one was running hotter than the other (specificly the choke and the output transformer )and the voltage was fluctuating up and down. so i rippped into it and found a pinched wire on each blocking flow. these were a real bear due to there age and everything kept failing ( wires, solder joints, sockets tec. etc). so it was like i would get something working then something else would brake over and over again.
i thought it would be cool and a little custom to change the way the tube layout was so i rewired it to have all the outputs in a row. got it all back together and no sound. AHHHHHHHHHHHHHHHH.
make a long story short, i ripped in the other one to make it match. i had to put them down for a while because i got sick of them kicking my ***.
thats where this 4 tube project came into the picture.

 

[jasondace2b]

AT-100L's? Pretty low primary impedance for a pair of 6550/kt88.

jeff

that amp has 2 pairs of 6550s. still a little low BUT in the ball park i thought.

 

[vinylkid58]

that amp has 2 pairs of 6550s. still a little low BUT in the ball park i thought.

Based on your previous comment, it sounded like you wanted to change from 4 6550's to 2 6550's for the output stage, while retaining the big Antek OPT.

jeff

 

[jasondace2b]

allow me to clarify then,
the new project two rca black plate 6l6gc tubes for either a 3800 ohm plate load or 5000 ohm plate load

 

[jasondace2b]

well they are done, as far as the guts go anyway. wurlitzer with a baldwin circuit. here are a couple of candid shots i will post some more when i finish the outside, and neat up the inside a bit.
the work very well , ut there seems to be a hump in the mid to high mid response. with instruments they are very dynamic and lively. voice sounds thin and less trrue to reality. is there anyway to maybe smooth that out with feedback or with the input impeadeance? see told you i dont know sqwat.

*** oh yeah they Buzz a little. whats that about?
pictures wont load i'll try again later

 

[Matt BH]

If you could post the schematic it will help, even if its a scribble on an envelope(take a photo of it). I prefer it that way anyway, some of the diagrams the spice users produce are almost unreadable.

Feedback should/could help with the midrange hump but we will need the actual schematic and voltages etc.

I have just finalised my 6L6/807 etc. design it pretty much follows the http://www.diyaudio.com/forums/tubes-valves/133034-6l6gc-ab2-amp.html thread.

So what is the primary impedence of your output transformers? I cant guess from previous posts.

Cheers Matt.