[Collins] 30L-1 amp DAHL transformer question

[Dr. Gerald N. Johnson]

30L-1 always had silicon rectifiers.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 6/6/2011 10:13 AM, Bruce H McIntosh wrote:
> On Sun, 2011-06-05 at 11:46 -0400, frankshughes at aim.com wrote:
>>
>> Hi,
>> I have a spare transformer for my Collins 30L-1. The transformer is a custom...
>
>> The Harbach guys don't know what it is wound for...
>>
>> Any guesses...
>
>> COLLINS 30L-1 ADVERTISED UNIT (standard transformer, for comparison)
>> PR) 115/230 VAC 50/60 HZ 1 PH
>> S1) 650 VAC 0.7A CCS
>> S2) 120 VAC @ 0.020A CCS
>> S3) 6.3 VCT @ 16A CCS
>
>> COLLINS 30L-1-1 MODIFIED SEC 1 VOLTS&  SEC 2 CURRENT (this is the custom wound unit)
>> PR) 115/230 VAC 50/60 HZ 1 PH
>> S1) 550 VAC 0.7A CCS
>> S2) 120 VAC @ 0.100A CCS
>> S3) 6.3 VCT @ 16A CCS
>
> Maybe it was for a unit wherein a tube HV rectifier was replaced with
> silicon diodes?  Or maybe lower HV (with slightly lower output power)
> would allow for cooler operation and longer tube life?
>