Find an old bit of coax - not low loss - with a stranded inner. Remove the sheath and screen and you are left with an EHT cable that looks - and performs - like the cable used for many EHT rectifier heater windings.occiput wrote:Stranded equipment wire inside e.h.t. sleeving makes a very good replacement.
freya wrote:Assuming your using the trader sheets, then first suggestion is swapping V15 over with V11. Has C52 0.01 been changed. Screen grid variation is probably R129 330 ohm being slightly high.
marc wrote: R64 was the culprit, EHT has come up along with narrow band of raster !
Off to do some tweaking and see if it's possible to get a picture.
marc wrote:Another issue is that the frame amplitude slider pot had fallen apart (as they do) so I tacked in and old 10K rotary pot, it works but seems to get very warm, any idea of the minimum wattage required for a pot in this position would be very welcome.
freya wrote:How does the tube test Marc ? it could be a bit low..
freya wrote:One of my lv20 tubes was so flat it didnt measure on the B&K. I used the rejuvinate and it came up and stayed at 90%.to this day. Might be worth it as its so bad.
freya wrote:That is a real pity. Hopefully somthing will turn up. Its odd you got as much as you did with zero emission though.
CrustyTV wrote:Its possible the tube had been bopped before, perhaps more than once.
try contacting Luke as I'm sure he had a whole load of B&W tubes, he may still have them, though I cannot remember what he had.
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