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Technical Help: About the SBT-10A tube with 1 mtr. long cable.
- Electrodemente
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7 years 7 months ago #3152
by Electrodemente
Hi everybody!
Just I got my "new" (never used!) SBT-10 tube.
I would like to connect it by a cable (from 70 to 100 cms). I know...
I have some cables; 1 coaxial (0.15 nF and .1 ohms x meter) and shielded multi-paired (10 pairs with 0.1 nF between pairs and .1 ohms x meter)
Is necessary keep in mind the SBT-10 is a 10 tubes (10 anodes and common catode)
Option A: I can use the coaxial one (this means, I should put 1 x 10M resistor (may be 30M or 40M? ) on the junction once all cathodes are bridged)..
-- In that case; the total cable Capacitance would be 0.15 nf, but...I lose the independent internal tube reaction, isn´t?
Option B: I can use the 10 multi-paired.
-- I think is desirable to add to direct to each anode a 10M resistor and then a separate cable that connects with the power supply? It will be right? (capacitanceare too high in that case due to the parallel each pair capacitance?)
And if I use this cable, or I add an external pair extra...or I use the cable shield as "cathode to ground" (and ...In the last case I´ll increase the capacitance, or?)
I know all recommendations are "Use cable as short as possible, even a couple of centimetres long... but if there are a correct way,
I would like you to help me and read all your comments/experiences/ideas/recommendations. Please.
Thanks in advance.
Regards.
Electrodemente.
Just I got my "new" (never used!) SBT-10 tube.
I would like to connect it by a cable (from 70 to 100 cms). I know...
I have some cables; 1 coaxial (0.15 nF and .1 ohms x meter) and shielded multi-paired (10 pairs with 0.1 nF between pairs and .1 ohms x meter)
Is necessary keep in mind the SBT-10 is a 10 tubes (10 anodes and common catode)
Option A: I can use the coaxial one (this means, I should put 1 x 10M resistor (may be 30M or 40M? ) on the junction once all cathodes are bridged)..
-- In that case; the total cable Capacitance would be 0.15 nf, but...I lose the independent internal tube reaction, isn´t?
Option B: I can use the 10 multi-paired.
-- I think is desirable to add to direct to each anode a 10M resistor and then a separate cable that connects with the power supply? It will be right? (capacitanceare too high in that case due to the parallel each pair capacitance?)
And if I use this cable, or I add an external pair extra...or I use the cable shield as "cathode to ground" (and ...In the last case I´ll increase the capacitance, or?)
I know all recommendations are "Use cable as short as possible, even a couple of centimetres long... but if there are a correct way,
I would like you to help me and read all your comments/experiences/ideas/recommendations. Please.
Thanks in advance.
Regards.
Electrodemente.
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