Plate transformer

[kb2vxa]

No, 2500V @ 450mA each side of CT when feeding a full wave rectifier with a choke input filter you get 1800VDC at full load, 225mA when using the total secondary in a full wave bridge or doubler configuration. Maybe a dumb question, what's a 2CX250B? The first figure indicates the number of electrodes, the C is ceramic (the X alone is glass) and the last figures are plate dissipation. Methinks you meant 4CX250B, a very common ceramic forced air cooled VHF tetrode.

That's interesting, two modulating means AM, rather strange for Motorola. What kind of transmitter did you yank that out of? By the looks of the plate transformer and tubes I'd say about 500W RF outpoot, the modulator alone is capable of 500W audio so the tubes just loaf along. It must have some fairly hefty mod iron so you wouldn't happen to be an AM Gangsta now, wudja wudja wudja?

[koØm]

No, 2500V @ 450mA each side of CT when feeding a full wave rectifier with a choke input filter you get 1800VDC at full load, 225mA when using the total secondary in a full wave bridge or doubler configuration. Maybe a dumb question, what's a 2CX250B? The first figure indicates the number of electrodes, the C is ceramic (the X alone is glass) and the last figures are plate dissipation. Methinks you meant 4CX250B, a very common ceramic forced air cooled VHF tetrode.

That's interesting, two modulating means AM, rather strange for Motorola. What kind of transmitter did you yank that out of? By the looks of the plate transformer and tubes I'd say about 500W RF outpoot, the modulator alone is capable of 500W audio so the tubes just loaf along. It must have some fairly hefty mod iron so you wouldn't happen to be an AM Gangsta now, wudja wudja wudja?

Typo!


Output section had two 4CX250B and, it did have a modulator, with two 4CX250B tubes.

1250 volts on each side of CT, 2500 volts total; I ran the output into a FWB, slowly brought it up to over 3300 vdc with variac. I stopped at 3300 because I didn't trust my capacitance bank, still had more range to go on the variac.

I am not sure what type of transmitter (brand or model), I was hoping that someone had run across a X-former like this in the past; I found a little info on the Triwec Transformer Company but, not spec on details on their products.

In my experience, a 1250 vac transformer weighing 45 pounds will supply more than 225 milliamps.

Here's what the experts (W8JI and WB2WIK) had to say:

http://www.eham.net/ehamforum/smf/in...topic=104455.0

.

[NQ6U]

Here's what the experts (W8JI and WB2WIK) had to say:

http://www.eham.net/ehamforum/smf/in...topic=104455.0

If you've asked The WIK, why bother asking anyone else? After all, he worked in Ottó Bláthy's lab and was his close personal friend.