DC heater (+/-) -> elevated?

Cobra2 · 29th March 2008, 08:31 AM

I will experiment with DC-heater on an Aikido, and planned to use a simple regulator-board, with dual (+/-) supply.
Instead of using the made-up centre-(hum)tap for AC to elevate it, should I use the 0V (gnd) for elevation?

Arne K

SemperFi · 29th March 2008, 08:57 AM

I suspect the point of experimenting will be to find the best solution after having tried all posibilities

I have tried both regulated DC and AC heaters and even on high gain circuits (high gain guitar preamps) having the AC heaters biased somewhere between +20 and +90 volts have been jsut as good as reg'ed DC.
With the Aikido one tube (including its cathode) sits at high voltage, so I would place the heaters close to this voltage, preferably above.
Please post ur findings after your experiment.

mashaffer · 29th March 2008, 02:05 PM

I am doing a guitar amp (PP 6V6) and was planning on elevating the heaters by just hooking the center tap of the heater winding directly to the cathode of one of the 6V6s. Is there any down side to that approach?

mike

SemperFi · 29th March 2008, 02:39 PM

No probs at all. I think it is the most common approach among those that elevate the heaters.

29th March 2008, 08:31 AM	#1
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	DC heater (+/-) -> elevated? I will experiment with DC-heater on an Aikido, and planned to use a simple regulator-board, with dual (+/-) supply. Instead of using the made-up centre-(hum)tap for AC to elevate it, should I use the 0V (gnd) for elevation? Arne K __________________ Ars longa, vita brevis

29th March 2008, 02:05 PM	#3
mashaffer diyAudio Member Join Date: Jun 2004 Location: Indiana	Tied to cathode I am doing a guitar amp (PP 6V6) and was planning on elevating the heaters by just hooking the center tap of the heater winding directly to the cathode of one of the 6V6s. Is there any down side to that approach? mike

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29th March 2008, 08:57 AM	#2
SemperFi diyAudio Member Join Date: Jan 2002 Location: nowhere	I suspect the point of experimenting will be to find the best solution after having tried all posibilities I have tried both regulated DC and AC heaters and even on high gain circuits (high gain guitar preamps) having the AC heaters biased somewhere between +20 and +90 volts have been jsut as good as reg'ed DC. With the Aikido one tube (including its cathode) sits at high voltage, so I would place the heaters close to this voltage, preferably above. Please post ur findings after your experiment.

29th March 2008, 02:39 PM	#4
SemperFi diyAudio Member Join Date: Jan 2002 Location: nowhere	No probs at all. I think it is the most common approach among those that elevate the heaters.

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