at idle, roughly 160ma, depending on bias. the current draw will be higher upon startup since the filter caps charge upcos000 wrote:Can someone make a test and say how much current is the amp draining with all the knobs to 0?
1959 Transformers
Moderator: VelvetGeorge
-
Roe
- Senior Member
- Posts: 5056
- Joined: Thu Apr 13, 2006 1:36 pm
- Just the numbers in order: 7
- Location: Drontheim. Norwegen
- Contact:
Re: 1959 Transformers
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
-
cos000
- New Member
- Posts: 39
- Joined: Tue Feb 11, 2014 7:58 am
- Just the numbers in order: 13492
Re: 1959 Transformers
Thanks.Roe wrote:at idle, roughly 160ma, depending on bias. the current draw will be higher upon startup since the filter caps charge upcos000 wrote:Can someone make a test and say how much current is the amp draining with all the knobs to 0?
160mA with all tubes installed and 120V 60Hz?
How did you measure the current?
-
Roe
- Senior Member
- Posts: 5056
- Joined: Thu Apr 13, 2006 1:36 pm
- Just the numbers in order: 7
- Location: Drontheim. Norwegen
- Contact:
Re: 1959 Transformers
yes, 160ma on the PT secondary with tubes. 120v or 230v doesn't matter for the secondary. I have not tried to measure this exactly.
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
-
cos000
- New Member
- Posts: 39
- Joined: Tue Feb 11, 2014 7:58 am
- Just the numbers in order: 13492
Re: 1959 Transformers
Thanks and on primary? Only with the main switch on, the other in standby mode. You measured this 160mA on high voltage taps?Roe wrote:yes, 160ma on the PT secondary with tubes. 120v or 230v doesn't matter for the secondary. I have not tried to measure this exactly.
-
Roe
- Senior Member
- Posts: 5056
- Joined: Thu Apr 13, 2006 1:36 pm
- Just the numbers in order: 7
- Location: Drontheim. Norwegen
- Contact:
Re: 1959 Transformers
160mA is with the amp at idle, but not in standby. I haven't measures the primary. should be fairly low, except when the filter caps chargecos000 wrote:Thanks and on primary? Only with the main switch on, the other in standby mode. You measured this 160mA on high voltage taps?Roe wrote:yes, 160ma on the PT secondary with tubes. 120v or 230v doesn't matter for the secondary. I have not tried to measure this exactly.
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
-
cos000
- New Member
- Posts: 39
- Joined: Tue Feb 11, 2014 7:58 am
- Just the numbers in order: 13492
Re: 1959 Transformers
Measured today only the transformer with professional instruments at my ex school.
We powered it up with a variable power supply and tested all the windings...
These are the results at 50Hz:
120V - 1,27A
220V - 0,66A
240V - 0,64A
According on how I measured before... The nice thing is that these value don't change if I switch on the amp... It changes only the active power (with a reduce of the reactive one - The current mantains the module)...
But the amp works except for little popping/crackling when powered up that go away in a minute...
We powered it up with a variable power supply and tested all the windings...
These are the results at 50Hz:
120V - 1,27A
220V - 0,66A
240V - 0,64A
According on how I measured before... The nice thing is that these value don't change if I switch on the amp... It changes only the active power (with a reduce of the reactive one - The current mantains the module)...
But the amp works except for little popping/crackling when powered up that go away in a minute...