[Central-Electronics] 20A Serial 4544

[Jeffrey Welsh]

Curt,
I have one with wrinkle finish with rack
mount + handles, and another with gloss finish without handles.  FYI
cheers
jeffrey
KD2AZI

Sent from my iPhone

> On Feb 11, 2020, at 16:14, AA8K73 GMail <aa8k73 at gmail.com> wrote:
> 
> 
> I would use a low-value resistor to limit charging current to the filter capacitors.  Also, a HV fuse to protect the transformer secondary from a shorted filter capacitor.
> 
> My line voltage is almost 125 VAC now, compared to the 110 VAC when this equipment was designed.  Can be a challenge for Heathkit equipment with electrolytic capacitors right at the voltage limit.
> 
> Mike - AA8K
> 
> 
>> On 2/11/20 11:29 AM, Curt wrote:
>> Just received a very nice 20A in the rack mount configuration. Includes the QT-1.   I have never seen a picture of one of these before and wonder if they all came with rack handles?
>> Also, on receiving inspection, I see potting pitch around the bottom of TR-1.  It is a bead about 3/16 dia around 1/2 of the diameter of the can.  Is this a common thing or should I plan on finding a replacement?
>> What is the consensus on changing to SS rectifier  and resistor  to replace the 5U4?  I like reducing the load on the transformer and the exposure of the HV to the filament winding.   Are theses transformers a problem area like the ones in the old Hallicrafters HT-37s?
>> Thanks.  I look forward to putting this 20A on the air.
>> Curt,  KU8L
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