davyrocket2 wrote:well I have just won the auction £20.00 the seller states its model is a ,CTV,28 .Is it a 26,inch version ?
davyrocket2 wrote:The tube fitted is ,A66/410 ,is this a delta gun type,?
davyrocket2 wrote:I suspect there is a very heavy short somewhere but not having a circuit diagram for it I am unsure where to look next
davyrocket2 wrote:after careful removal of the LOPT it is short circuit
davyrocket2 wrote: BU208A .......... any ideas please of source of replacement items ?
davyrocket2 wrote:I am sure the tripler is at fault ..........................any ideas please of source of replacement items ?
davyrocket2 wrote: anyone has these items costs of course including postage will be met and I would think a decent tube is as rare as rocking horse poo
slidertogrid wrote:I don't know if this chassis is the same heater circuit as the 725. That set had two resistors on parallel on the tube base panel. ISTR they were 2.2 or 2.7 ohms.
slidertogrid wrote:In my experience 110 degree delta gun tubes don't respond well to reactivation they either die completely or go flat again within a short time. I don't know If the cathode coating was thinner?
There are various ways of increasing the voltage to the heater you could use a separate suitable transformer but a easier way is to try lowering the value of the series resistor in the heater supply.
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