[Hammarlund] Question/Help on SP-600 fuses

[James A. (Andy) Moorer]

It is a 1.6A slo-blow or a 3A fast-blow, which will blow from time to time. 
The slo-blow will not. You are right - it is just that startup transient. 
Most slo-blo fuses will take that, but they are sometimes harder to find, 
say, at Radio Shack.

Blowing a fuse after startup is generally one of those capacitors (like C162 
or C164) that is right across the HV supply and has sprung a leak. Or a tube 
that has developed a short, but that should be pretty easy to figure out.

James A. (Andy) Moorer
www.jamminpower.com

----- Original Message ----- 

>
> Depending on the serial number the power line fuse for a sp-600 is 1.6 A
> or 3A.
> Why the difference ?
>
> Now for the hard question: The sp600 I am currently working on
> periodically
> blows the 3A power line fuses at turn on. Once on the rig seems to run
> fine.
> Any suggestions for cause/trouble shooting ?
>
> I'll pull the HV rectifier and see what happens.
> If necessary check out the resistances again.
>