[Amps] SB-220

[R.Measures]

On Dec 27, 2004, at 8:35 AM, R.Measures wrote:

>
> On Dec 27, 2004, at 7:16 AM, Dan wrote:
>
>> Richard,
>> I would think the inrush protection as on your site would no doubt be 
>> good regardless just to calm everything down a little when the amp is 
>> switched on.. Even though the 811H HV is at 1700 volts  I have looked 
>> at the circuit on your site and assume it would have to be changed a 
>> little on the Ameritron as the Ameritron 811H does not have a relay  
>> from transformer as noted.
>
> A separate relay is required for step-start, no matter how the 
> amplifier is switched on.  The relay coil-V can be 12vdc, or whatever 
> DC-V is available from the extant relay PS.  - note - For a 12vdc 
> coil, FWD rectify the fil's 6V-ac and use a series-R with the coil to 
> set make at 2/3 of normal HV.  Also, a FWD might provide enough 
> rectified V to pull in a 12v relay.

Correction.  A FWB might provide enough ... ... ...
>
>>


Richard L. Measures, AG6K, 805.386.3734.  www.somis.org