I picked up two hundred 1W 270R carbon composition resistors for a $2 at a ham swap last month. The resistor body is 15mm x 5.8 mm. I was going to keep them as my "lifetime" stock of grid stoppers...
Is there any rule about not using 1 watter's as grid stoppers? They should have no difference than 1/2 watter's in that position no? They certainly have twice the carbon 🙂
Is there any rule about not using 1 watter's as grid stoppers? They should have no difference than 1/2 watter's in that position no? They certainly have twice the carbon 🙂
Absolutely fine,top notch grid stoppers, all you need now is a stock of 2K7's and your sorted for most OP stages. I use 2W and bigger sometimes on OP stages,far less likely to go high after a transient event.
Andy.
Andy.
Thanks. I'll be at the big Ft Wayne IN ham swap 11/13 if I see a bag of carbons anything under 3K I'll pick them up.
Just a quick question around grid stoppers - how much do carbon comp resistors improve on standard metal film, and why? I just use my regular Holcos and Vishays.
The Holcos are spiral etched resistive element types and have some inductance which can be reactive. The carbon comps are non-inductive. The Vishays depend on the model.
No improvement at all. Resistor inductance only matters for very tiny resistance values. Carbons can be useful if high energy pulses are expected, but as grid stoppers that's irrelevant.