What kind of voltages do you prefer in your 45/100s (at idle and when running)? Having tried voltages from 480 to 560v (at idle) in 4 different jtm45/100s w/kt66s, I think I prefer the sound of plate voltages around 520-530v. However, the higher voltages give a nice, punchy response though.
The marstran 1204-43 seem to sag quite a bit under load (like the originals did). When I tried the other day, one of my amps saged 40v when playing a little ac/dc (and even more when running flat out). Do the metro -43 sag this much?
Finally, what kind of choke are you running? I'm using the RS in one of my 45/100s and its 690ohm resistance brings down the screen voltage quite a bit (around 400v when running flat out, although its 525-530 at idle)
prefered voltages?
Moderator: VelvetGeorge
-
Roe
- Senior Member
- Posts: 5054
- Joined: Thu Apr 13, 2006 1:36 pm
- Just the numbers in order: 7
- Location: Drontheim. Norwegen
- Contact:
prefered voltages?
http://www.myspace.com/20bonesband" onclick="window.open(this.href);return false;
http://www.myspace.com/prostitutes" onclick="window.open(this.href);return false;
Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39
http://www.myspace.com/prostitutes" onclick="window.open(this.href);return false;
Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39
-
neikeel
- Senior Member
- Posts: 7231
- Joined: Tue Dec 06, 2005 8:31 am
- Location: Suffolk, England
Re: prefered voltages?
Not been that forensic (although perhaps I shouldRoe wrote:What kind of voltages do you prefer in your 45/100s (at idle and when running)? Having tried voltages from 480 to 560v (at idle) in 4 different jtm45/100s w/kt66s, I think I prefer the sound of plate voltages around 520-530v. However, the higher voltages give a nice, punchy response though.
The marstran 1204-43 seem to sag quite a bit under load (like the originals did). When I tried the other day, one of my amps saged 40v when playing a little ac/dc (and even more when running flat out). Do the metro -43 sag this much?
Finally, what kind of choke are you running? I'm using the RS in one of my 45/100s and its 690ohm resistance brings down the screen voltage quite a bit (around 400v when running flat out, although its 525-530 at idle)
). Recent gigs quite small indoor (< 250 people) so been using 50watters or my 18w. We have x3 outdoors to do in next month so will be taking the 45/100. My metro had an early -43 with the higher voltages. I am really happy with it although most the stuff we are playing at the moment (funk, pop and indie) I run in the clean range with a bit of fuzz or boost for dirty stuff but more often a bit of slap back or a touch of compression. I like the thick punchy response of this amp with the GECs.
Neil