The AM Forum

I read the S5130 replaces a 866A tube. I found the voltage rating at 7.4KV maximum. What is the diode current rating?

300mA

Thanks. It appears in full-wave center tap .6 amps from the pair.

Aw man, MV makes better DC than SS.

Any day.

So there!

3B28 with no warm up arc over are best rectifier tube. I bought the SS rectifiers as backup for my tube kWS-1 incase the filament transformer shorts, but are not the 11.4KV at .75 amp I need. So I listed these on eBay.

Everybody is in such a hurry!

Doesn't that TX have a timer to safely hit the HV?

In almost 60 years of broadcast engineering, I haven't had an arc-back failure.  Eventually, they die but that is gradual and easily replaced.

Get them hot, then they last a long time.

73DG

The KWS-1 does have a timer for HV, but a delay does not make a difference on a rectifier filament transformers internal short and the transformer can fail. This is why I want SS backup and disconnect the filament transformer.

Collins Magazine Spring 1992. The 'KWS-1 care and feeding' article. It states the HV rectifier filament transformer is the second highest rate of failure. The highest failure is the choke. Mount on ceramic insulators and issue goes away.