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Stromberg-Carlson radiogram cabinet, need help with valves.
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Return to top of page · Post #: 16 · Written at 2:04:24 PM on 7 April 2013.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6822
Also does anyone have a picture of what a 6V6, 6M5 and a 6X5GT look like? For the purpose of identification, photos of valves can sometimes be uninformative or even misleading as there are often variations of each type. For example, here's an assortment of 6V6 valves: http://upload.wikimedia.org/wikipedia/commons/9/96/6V6s.JPG. Here are some 6X5 valves: https://www.tubeworld.com/6x5gt4.jpg. And here's a 6M5: http://www.radiomuseum.org/images/tubephoto_klein/6m5.jpg.

Return to top of page · Post #: 17 · Written at 7:46:45 PM on 7 April 2013.
	Direbear Location: Adelaide, SA Member since 22 April 2012 Member #: 1135 Postcount: 13
Hi there guys ok... from looking at the pic of a 6M5, I believe it would be wise to conclude that what I must have is a 5A50, because it is too small, the "... 6AV6, 6V6 and 6X5GT." end line up seems to match more with what it is. I actually found I have a 6AV6 so I'm only missing the 2 larger ones, the 6V6 and the 6X5GT. So if all goes well maybe this little mystery is solved. Now I will hunt down some of those missing valves I need and see if plugging them in gets me some sound. Image Link Image Link Image Link

Return to top of page · Post #: 18 · Written at 9:25:23 PM on 7 April 2013.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6822
I'd be wanting to verify my guess by carefully checking the existing components around the valve sockets against the 5A50 schematic before plugging any valves in and powering up. Do you have the schematic?

Return to top of page · Post #: 19 · Written at 9:48:28 PM on 7 April 2013.
	Direbear Location: Adelaide, SA Member since 22 April 2012 Member #: 1135 Postcount: 13
Hrmm.... no I do not. Are they easy to find on the web?

Return to top of page · Post #: 20 · Written at 10:07:57 PM on 7 April 2013.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6822
Some are, but many are not. If you unhide your email address via Control Panel I'll send you a copy.

Return to top of page · Post #: 21 · Written at 11:00:00 PM on 7 April 2013.
	MonochromeTV Location: Melbourne, VIC Member since 20 September 2011 Member #: 1009 Postcount: 1226
Yes the "Velvet Action" is a very troublesome changer. This is because the idler wheel doesn't automatically disengage from the motor pulley when not in use. This causes a flat, or more rather, a crescent spot on the idler wheel rubber.

Return to top of page · Post #: 22 · Written at 11:29:39 PM on 7 April 2013.
	Direbear Location: Adelaide, SA Member since 22 April 2012 Member #: 1135 Postcount: 13
OK ive unhidden it... Thanks GTC.

Return to top of page · Post #: 23 · Written at 11:47:24 PM on 7 April 2013.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6822
Okay, sent.

Return to top of page · Post #: 24 · Written at 10:41:33 AM on 8 April 2013.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5483
One of the greatest causes of the arm underneath sticking, platters locking, etc. is that the grease has dried out. The Fisk HMV of the Radio Club here recently did that. The turntables do need lubrication at regular intervals. The Grease soaps do dry out often locking shafts. Cleaning & re-lubricating solved the problem with the Club one & several others over the years. All of the old grease should be removed, mixing grease soaps of different type & manufacturers can (and I have seen it; CASA wrote an article on it) cause the soap to solidify and loose all lubricating propeties. Marc

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