I recently bought an HRO-Senior with a power supply that does not match that
receiver type.

It probably is the companion of a more recent HRO version, or of another
receiver though probably still National.

Can anybody help me to identify it? It can be seen at
http://www.qsl.net/i0jx/power_supply.jpg The Rectifier tube is type 80.

Thanks & 73

Tony I0JX,
Rome Italy

On Nov 11, 3:48*pm, "Antonio Vernucci" wrote:
I recently bought an HRO-Senior with a power supply that does not match that
receiver type.

It probably is the companion of a more recent HRO version, or of another
receiver though probably still National.

Can anybody help me to identify it? It can be seen athttp://www.qsl.net/i0jx/power_supply.jpgThe Rectifier tube is type 80.

Thanks & 73

Tony I0JX,
Rome Italy

I believe it is a homebuilt power supply. and A very nice looking
one..As I recall ,the old doghouse supply was difficult to work on,
created a bit of heat and was probably not one of Nationals better
designs. If it works good use it and appreciate it.I say..W4PQW

On Nov 12, 8:30*am, " wrote:
On Nov 11, 3:48*pm, "Antonio Vernucci" wrote:

I recently bought an HRO-Senior with a power supply that does not match that
receiver type.

It probably is the companion of a more recent HRO version, or of another
receiver though probably still National.

Can anybody help me to identify it? It can be seen athttp://www.qsl.net/i0jx/power_supply.jpgTheRectifier tube is type 80.

Thanks & 73

Tony I0JX,
Rome Italy

I believe it is a homebuilt power supply. and A very nice looking
one..As I recall ,the old doghouse supply was difficult to work on,
created a bit of heat and was probably not one of Nationals better
designs. If it works good use it and appreciate it.I say..W4PQW

The transformer and choke? have a 'National' look to them??????
Anybody agree?
An 80 rectifier suggests late 1930s?