zaphod wrote:
Awesome! Congratulations!
So did you do the ladder arrangement of resistors at the 6V6 and EL84 grids, like I showed you? And what kind of rectifier are you using?
One word of warning, if you go for the huge cathode cap trick, you need to bias the power tubes a little cooler. Like a shared 180 ohms on the EL84 pair's cathodes and 270 ohms for the 6V6 pair.
I am waiting on a shipment of parts, then I will do the ladder on the grids. Right now I have it set up as it was in the Trinity V6, which seems to default to the EL's and not hit the 6v6's as hard. I will heed your warning and adjust my cathode resistors as well, thanks.
coco wrote:
Great to hear. That iron was from Heyboer and is the 36 watt spec iron based on the 18 watt.com 36 watt amp derivative. The OT may have a bit more high end response so maybe that's why you're heaing a bit of hiss now.
You talk about using 6V6 & EL84 so do you have a mix of 2-EL84 & 2-6V6 running into the same OT? or have you settled on one type?
I didnt really think this through as well as I could have Stephen. As you know, the chassis is punched for 2 of each kind of tube. I could get the holes enlarged, but I thought I would try running a mix of power tubes. I tell ya, it sounds absolutely beautiful, kinda reminds me of one of those old Reeses peanut butter cup commercials, two great tastes that taste good together. The thing is, I played the amp for a day as an 18 watt, with just the 6v6's, but with the 36 watt OT. The hiss was there even then too. I just hope I havent wired it wrong. Are the wire colors universal, ie, the impedances and such? I can probably live with the hiss, but it bugs me because I was so proud of how quiet the amp was before. I went around bragging every time I turned it on.....