Vintage Television

Forum home - Go back to Vintage Television

A Tale of Two H.M.V.'s Part one of several
« Back · 1 · 2 · 3 · 4 · Next »
Return to top of page · Post #: 31 · Written at 4:20:16 PM on 6 April 2020.
	Labrat Location: Penrith, NSW Member since 7 April 2012 Member #: 1128 Postcount: 402
Hi Ian. I'm sorry about the length of time it took me to answer your question. The thyristors were all sourced years ago from sets with dead picture tubes. Mostly from Blaupunkts. They were very popular in the area I worked. Some came from HMV's, not so popular, and does any one remember the M8 chassis Nationals, or the Sharp C1831X ? That set was a Frankenstein's monster. I have used up most of the Horizontal thyristors, but have a number of Retrace thyristors left, as can be seen in the photo I'm sending. The horizontal thyristors failed more often than the retrace thyristor. Live long and prosper. Wayne.

Return to top of page · Post #: 32 · Written at 7:38:35 PM on 7 April 2020.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7548
Photo uploaded to Post 31. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 33 · Written at 9:55:23 PM on 27 January 2022.
	Pitchersj Location: Albury, NSW Member since 2 July 2017 Member #: 2134 Postcount: 181
I just got a beautiful HMV Ambassador recently. Has been checked and repaired and is working beautifully Photo sent to Brad for uploading

Return to top of page · Post #: 34 · Written at 6:01:16 PM on 29 January 2022.
	Labrat Location: Penrith, NSW Member since 7 April 2012 Member #: 1128 Postcount: 402
Great news. Looking forward to seeing the pictures. Wayne.

Return to top of page · Post #: 35 · Written at 7:19:18 PM on 29 January 2022.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7548
Just letting you know I have not received the photos yet. Are you sending to the correct address? ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 36 · Written at 1:02:29 AM on 30 January 2022.
	Pitchersj Location: Albury, NSW Member since 2 July 2017 Member #: 2134 Postcount: 181
Brad The email bounced back to me What is the correct email address??

Return to top of page · Post #: 37 · Written at 11:03:56 AM on 30 January 2022.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7548
Just click on my username. It can be accessed there. I don't want to publish it on the forums as it will get spammed. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 38 · Written at 9:40:29 PM on 2 February 2022.
	Pitchersj Location: Albury, NSW Member since 2 July 2017 Member #: 2134 Postcount: 181


Return to top of page · Post #: 39 · Written at 11:34:53 PM on 2 February 2022.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7548
Photo uploaded to Post 38. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 40 · Written at 10:34:59 PM on 5 July 2024.
	Pitchersj Location: Albury, NSW Member since 2 July 2017 Member #: 2134 Postcount: 181
My C221 Ambassador (Pictured above) has developed some vertical issues. Brightness flickers in and out. In dark scenes it compresses even more. Any ideas ? I really love watching this set, it has a beautiful colour picture I'm in Albury NSW

Return to top of page · Post #: 41 · Written at 3:25:34 PM on 16 July 2024.
	Irext Location: Werribee South, VIC Member since 30 September 2016 Member #: 1981 Postcount: 485
That's a C212. Identifiable by the concentric fine tuning knob. It looks like it came out of a time machine. A very nice example. Oxidisation on the PCB pins can cause all manner of weird faults. A good spray of Deoxit on the pins is a good place to start.

Return to top of page · Post #: 42 · Written at 4:52:21 PM on 16 July 2024.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6882
A good spray of Deoxit on the pins is a good place to start. I use DeoxIT for pots, but use CRC CO Contact Cleaner for pins, edge connectors, etc as it leaves no residue. https://crcindustries.com.au/crc-co-contact-cleaner-350g-2016/

Return to top of page · Post #: 43 · Written at 8:08:31 PM on 16 July 2024.
	Ian Robertson Location: Belrose, NSW Member since 31 December 2015 Member #: 1844 Postcount: 2628
I looked at the video Stephen. It looks like a bad connection on one of the wire-wrap pins where the power supply connects to the deflection board. Might also be on one of the power pins. Those Utilux pins are tin plated and they oxidise. Usually by the time you get a fault like that the contacts on the PCB have heated and lost their tension. You can often tell which pin because the plastic insulation strip becomes discoloured around the hot pin. It's probably past the usual contact cleaner approach, some physical intervention to clean the pins with a mild abrasive (like Silvo) is needed.

Return to top of page · Post #: 44 · Written at 8:10:47 PM on 16 July 2024.
	Ian Robertson Location: Belrose, NSW Member since 31 December 2015 Member #: 1844 Postcount: 2628
The C212 has the transistor deflection circuit (no SCRs), is that correct Wayne?

Return to top of page · Post #: 45 · Written at 12:47:57 PM on 17 July 2024.
	Irext Location: Werribee South, VIC Member since 30 September 2016 Member #: 1981 Postcount: 485
C221 Rangemaster has the transistor deflection and is far more reliable.

« Back · 1 · 2 · 3 · 4 · Next »
You need to be a member to post comments on this forum.

Vintage Television

Sign In