[Amps] SB-220

[Dan]

Richard & others...

How does the Ameritron 811H fit into this same questions thanks
Dan
==


*********** REPLY SEPARATOR ***********
On 12/27/2004 at 6:48 AM R.Measures wrote:
>On Dec 27, 2004, at 2:33 AM, Larry Stowell wrote:
>
>> I have a SB-220 and am wondering if it is better to turn it off when 
>> its not going to be used for a couple of hours? I turn my radio's on 
>> early morning and leave them on most of the day.
>
>The good thing about leaving a SB-220 on is that it has a reasonable of 
>filament-V, so not much emissive life will be wasted by wasting the 
>electricity. The bad thing about starting a SB-220 is that the inrush 
>current caused by the C-filter exceeds the peak-I rating of the ON-OFF 
>switch, which will eventually cause the switch to fail. For longest 
>life, install a step-start such as the one at Figure 1 on my Web site 
>and oil the fan bearings every two years.
>- cheers, Larry
>>
>> Larry K1ZW
>> Durham, NC
>
>Richard L. Measures, AG6K, 805.386.3734. www.somis.org
>