Paramount II

[Grainger49]

Xavier,

Happy New Year!

The CL-90 is nice for keeping the startup voltage from hammering the rectifier circuit but, sadly, it doesn't help in Cathode stripping (Insert David Rose & Orchestra here).

If I have it right, the high voltage is applied after the heater is at its rated voltage.  It can be done the cheap way, as I would do it, by putting a properly rated switch in the B+ to the output tube.  Maybe to the B+ to the driver too, I'm not sure.

The trick here is the properly rated switch.  Looking at Mouser most are rated at 125V, all sorts of current ratings.  I found one that is rated at 250V 1A.  That current is great but still not quite enough voltage.

Here are some 250V 1A results:    http://www.mouser.com/Electromechanical/Switches/Toggle-Switches/_/N-5g2j?P=1z0x3ugZ1z0z812

By the way, I would have loved to watch the security guys looking at a bag full of tubes.  My Post Office and mail carrier both think I'm weird sending and receiving Russian Military Surplus capacitors.  Too many packages from Ukraine, I'm probably under surveillance.

[Paul Joppa]

Well, I'm a cautious engineer type so I would of course recommend saving the RCAs until the board is installed. But I've never actually heard of a problem with those tubes. Maybe someone else here is using them and would comment?

[xcortes]

Thanks Paul and Grainger.

I think that I'll install the Rubli's B+ delays that have been discussed before. Eventually, when the BH boards are available I can move Rubli's to the Paramours in the HT.

The best for 2010!