13-10-2015, 11:32 AM
Hi Phil,
It really depends on what you want to achieve and what tackle you have to hand.
For a start have you got the Data Sheet? - http://www.r-type.org/pdfs/el84.pdf
You're going to need a High Voltage Source - around 250 Volts - and a Heater Supply - 6.3 Volts (ac).
However, you can generate the 250 Volts from a Transformer, Rectifier and smoothing. Suitable Transformers usually have a 6.3V Winding. Something simple like this would do - http://www.ebay.co.uk/itm/Philips-HT-TRA...2ee7375b4b.
Alternatively you can supply the Hetare from a 6v Battery.
You'd need a couple of Electrolytics and a Resistor for smoothing.
If you have an old Radio or Amplifier then you could tack on to the Supplies from that.
After that, if you only want to measure the Emission, you just need a Valve Base and a couple of Resistors, plus your meter.
So, what have you got and what do you want to measure?
Be careful.
Alan
It really depends on what you want to achieve and what tackle you have to hand.
For a start have you got the Data Sheet? - http://www.r-type.org/pdfs/el84.pdf
You're going to need a High Voltage Source - around 250 Volts - and a Heater Supply - 6.3 Volts (ac).
However, you can generate the 250 Volts from a Transformer, Rectifier and smoothing. Suitable Transformers usually have a 6.3V Winding. Something simple like this would do - http://www.ebay.co.uk/itm/Philips-HT-TRA...2ee7375b4b.
Alternatively you can supply the Hetare from a 6v Battery.
You'd need a couple of Electrolytics and a Resistor for smoothing.
If you have an old Radio or Amplifier then you could tack on to the Supplies from that.
After that, if you only want to measure the Emission, you just need a Valve Base and a couple of Resistors, plus your meter.
So, what have you got and what do you want to measure?
Be careful.
Alan
