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Return to top of page · Post #: 46 · Written at 10:10:33 AM on 12 March 2017.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5488
One would need to know if it is on one or two cathodes, if at all. STC used around 6K on theirs. Is the one in it actually faulty? Some of them earth through the shaft.

Return to top of page · Post #: 47 · Written at 10:15:34 AM on 12 March 2017.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2198
Yes this one is definitely faulty. there are some spots where I get fairly healthy hiss and then nothing so I think its a replacement job. Its a wire wound pot with a ring of metal being pressed onto the wire via the shaft/actuator. I do have some new 5K, 10K and 20K pots ( ww ) in my stock .

Return to top of page · Post #: 48 · Written at 11:37:03 PM on 28 March 2017.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2198
This has thrown a curly one at me lol. We thought the antenna coil was open circuit because when I connected to the antenna lug on the chassis we got absolutely nothing. When I connected to the gang then I got reasonable performance. We aligned the set properly but we're still of the opinion that the coil was OC . But tonight I decided to do a bit of experimenting and I earthed the antenna lug and it sprang to life, so I am thinking maybe it's wired up backwards . What do you guys think?.

Return to top of page · Post #: 49 · Written at 12:24:03 AM on 29 March 2017.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6824
I am thinking maybe it's wired up backwards I've encountered that, and the set in question had been repaired by "an expert". The fellow in question also evidently believed that too much solder was barely enough.

Return to top of page · Post #: 50 · Written at 10:21:03 PM on 29 March 2017.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5488
If you earth the lug & it works that reads more like poor bonding aka a dry joint? If it has riveted to chassis lugs, corrosion is not you friend. If it is a corrosion issue it may pay to follow the example of Astor & a couple of others & wire all of the riveted ground lugs together and connect them to a common node. At the transformer. If a heater wire & the HV CT go to ground, they too connect to it. Marc

Return to top of page · Post #: 51 · Written at 9:21:38 PM on 6 April 2017.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2198
People this one is still on the bench. It is working quite strongly now. The only fault which is annoying has been traced to the wave change switch. It looks like its just a dirty terminal . What happens is I can pick up AM very well but its dead on shortwave but when I manually put the antenna wire to the short wave lug on the switch then it performs very well . I will try to give it a good soak in contact cleaner and see where I need to go from there..

Return to top of page · Post #: 52 · Written at 9:59:31 PM on 6 April 2017.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5488
Methinks you may have an open circuit coil primary.

Return to top of page · Post #: 53 · Written at 3:06:52 PM on 29 May 2017.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2198
Well people I have made progress with this one as well. The cabinet will look very spiffy when finished. Photos sent.

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