[Amps] Band switch

[Roger (K8RI)]

On 12/11/2010 12:47 PM, Dennis OConnor wrote:
> Hsu, those multi deck band switches bring hot RF carrying wires from the hi-power tank circuits, close together which is not desirable... Yes, I understand that it has been done that way from the early days of ham radio, but it is still a poor way electrically...
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> As far as the switch you show, from the pictures it looks like it is well made from quality materials..
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> Let me make a suggestion that you take a look at how Henry Radio handled the RF switching on the tank circuit on their remote tune 3/4/5/8 K series of amps...  The band switch for the tank coils would be a single pole, 6 position switch, that pulls in relays elsewhere in the tank (grid) compartment...Henry hand made their own high current (and high voltage bypass on the plate supply RF choke) relays using linear pull, AC solenoids and adding the RF contacts onto the solenoid rod...
>
I've seen this done on a very large scale in industry although probably 
not as large as you saw in an earlier life. <:-)). It worked very well. 
The only real difference would be one of scale...These had bundles of 
500 MCM cable running to them.

73

Roger (K8RI)
> denny / k8do
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