Power Supply on March '07 N&V Issue
Posted: Mon Mar 19, 2007 9:57 am
Since it seems a few of us are going to attempt to build this PSU, and a few of us have had issues sourcing parts, I think this would be a good place to combine our efforts.
The first thing that I am trying to find is the appropriate transformer.
T1 on the parts list is described as "120V Primary, dual 44V center tap secondaries @ 1.5A". I have sourced a transformer made by Hammond Manufacturing, part number 266J48. Here are the specs:
- Primary 117/234 VAC, 50/60 Hz.
- dual secondaries.
- Secondaries can be used as; a center tapped secondary, parallel connected or used individually.
- Open style.
- Minimum 6" long leads.
- Dual bobbin design - no electrostatic shield required.
- Class B insulation (130 degrees, C) for extra protection - UL listed as a Class A (105 degree, C) design
- Hi-Pot test of 2,000V RMS.
VA = 48
Secondary VAC in Series = 48V @ 1A
Secondary VAC in Parallel = 24V @ 2A
More info at http://www.hammondmfg.com/266.htm
There is also a model (266L48) with the 48V/24V leads at 2A/4A respectively.
Would the 266J48 be what we're after for T1?
For T2 the parts list says "120V Primary, 9V secondary @ 1.5A". Hammond has one (164H10) with these specs:
- Low profile, split bobbin design.
- Dual winding secondaries, non-concentrically wound
- Units are designed so that all windings must be used
- Low primary to secondary coupling - no electrostatic shield required.
- Choice of economical single primary 115V (164 series) or universal dual primary 115/230V (162 series) - either model 50/60 Hz operation.
VA = 20
Secondary VAC in Series = 10V C.T. @ 2A
Secondary VAC in Parallel = 5V @ 4A
More info at http://www.hammondmfg.com/162.htm
Would the 164H10 be what we're after for T2?
For T3 and T4 the parts list says "120V Primary, dual 9V @ 65mA secondaries". Hammand has one (266K18) with these specs:
- Primary 117/234 VAC, 50/60 Hz.
- dual secondaries.
- Secondaries can be used as; a center tapped secondary, parallel connected or used individually.
- Open style.
- Minimum 6" long leads.
- Dual bobbin design - no electrostatic shield required.
- Class B insulation (130 degrees, C) for extra protection - UL listed as a Class A (105 degree, C) design
- Hi-Pot test of 2,000V RMS.
VA = 27
Secondary VAC in Series = 18V @ 1.5A
Secondary VAC in Parallel = 9V @ 3A
More info at http://www.hammondmfg.com/266.htm
Would this be the right one for T3 and T4? This may be overkill, but it is the only one I could find with dual secondaries.
Am I on track with these transformers?
Thanks again in advance!!
The first thing that I am trying to find is the appropriate transformer.
T1 on the parts list is described as "120V Primary, dual 44V center tap secondaries @ 1.5A". I have sourced a transformer made by Hammond Manufacturing, part number 266J48. Here are the specs:
- Primary 117/234 VAC, 50/60 Hz.
- dual secondaries.
- Secondaries can be used as; a center tapped secondary, parallel connected or used individually.
- Open style.
- Minimum 6" long leads.
- Dual bobbin design - no electrostatic shield required.
- Class B insulation (130 degrees, C) for extra protection - UL listed as a Class A (105 degree, C) design
- Hi-Pot test of 2,000V RMS.
VA = 48
Secondary VAC in Series = 48V @ 1A
Secondary VAC in Parallel = 24V @ 2A
More info at http://www.hammondmfg.com/266.htm
There is also a model (266L48) with the 48V/24V leads at 2A/4A respectively.
Would the 266J48 be what we're after for T1?
For T2 the parts list says "120V Primary, 9V secondary @ 1.5A". Hammond has one (164H10) with these specs:
- Low profile, split bobbin design.
- Dual winding secondaries, non-concentrically wound
- Units are designed so that all windings must be used
- Low primary to secondary coupling - no electrostatic shield required.
- Choice of economical single primary 115V (164 series) or universal dual primary 115/230V (162 series) - either model 50/60 Hz operation.
VA = 20
Secondary VAC in Series = 10V C.T. @ 2A
Secondary VAC in Parallel = 5V @ 4A
More info at http://www.hammondmfg.com/162.htm
Would the 164H10 be what we're after for T2?
For T3 and T4 the parts list says "120V Primary, dual 9V @ 65mA secondaries". Hammand has one (266K18) with these specs:
- Primary 117/234 VAC, 50/60 Hz.
- dual secondaries.
- Secondaries can be used as; a center tapped secondary, parallel connected or used individually.
- Open style.
- Minimum 6" long leads.
- Dual bobbin design - no electrostatic shield required.
- Class B insulation (130 degrees, C) for extra protection - UL listed as a Class A (105 degree, C) design
- Hi-Pot test of 2,000V RMS.
VA = 27
Secondary VAC in Series = 18V @ 1.5A
Secondary VAC in Parallel = 9V @ 3A
More info at http://www.hammondmfg.com/266.htm
Would this be the right one for T3 and T4? This may be overkill, but it is the only one I could find with dual secondaries.
Am I on track with these transformers?
Thanks again in advance!!