|
Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
|
Thread Tools |
26th Mar 2018, 7:35 pm | #21 |
Heptode
Join Date: Sep 2009
Location: Kinver, Staffordshire, UK.
Posts: 628
|
Re: Pye LV30 main resistor chain
Well done roger.
I `ve never known any one rewind a voltage dropper before but you`ve done it and it works. It`s useful to known that the wire is still available. I will consider this option the next time I come across an o/c dropper. Robin |
26th Mar 2018, 7:47 pm | #22 |
Retired Dormant Member
Join Date: Jan 2018
Location: Chamalières, France.
Posts: 167
|
Re: Pye LV30 main resistor chain
Hi Robin,
Repairing this resistor is not a big deal once you have found the suitable resistive wire to use and make the proper calculation to get the correct value and cut the length for each section. I can give you the link to the suppliers on eBay.com if you will. Regards, Roger Note: as far as I know, the resistive wire used by PYE for this dropper is no more available. What I see from the remaining pieces of the original wire, it was about 67ohm/m with a diameter of more less 0.2mm. The approaching resistive wire on the market: 63ohm/m is far too thin(0.1mm diam or less) to resist the 300mA current and overheat. Last edited by rogerdup; 26th Mar 2018 at 7:56 pm. Reason: adding information |
27th Mar 2018, 12:18 pm | #23 |
Retired Dormant Member
Join Date: Jan 2018
Location: Chamalières, France.
Posts: 167
|
Re: Pye LV30 main resistor chain
For those of you tempted by this topic of rewinding main dropper, here after an interesting page about the characteristics of the resistive wires I used for doing this job.
https://www.isabellenhuette.de/filea...sch/ISOTAN.pdf Roger Last edited by rogerdup; 27th Mar 2018 at 12:19 pm. Reason: grammatical |
29th Mar 2018, 7:06 am | #24 |
Retired Dormant Member
Join Date: Jan 2018
Location: Chamalières, France.
Posts: 167
|
Re: Pye LV30 main resistor chain
.. And found a nice blue paint to put it same as the PYE original dropper.. It can support up to 800°C. I will test it this week-end.
Roger |
31st Mar 2018, 3:39 pm | #25 |
Retired Dormant Member
Join Date: Jan 2018
Location: Chamalières, France.
Posts: 167
|
Re: Pye LV30 main resistor chain
Here in its place. Like new !
Roger |
3rd Apr 2018, 12:07 pm | #26 |
Retired Dormant Member
Join Date: Jan 2018
Location: Chamalières, France.
Posts: 167
|
Re: Pye LV30 main resistor chain
I would like to correct what I said in a previous message. The total heaters voltage for the LV30 is around 160v and not 155,6v. Anyway the set is doing well with 156v..
Roger |