Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 Reliance Sky-Raider from Ebay
« Back · 1 · 2 · 3 · 4 · Next »
 Return to top of page · Post #: 31 · Written at 7:50:58 AM on 22 February 2018.
STC830's Gravatar
 Location: NSW
 Member since 10 June 2010
 Member #: 681
 Postcount: 1301

I have an old EA article on alignment which can be supplied if useful:

http://vintage-radio.com.au/default.asp?f=2&th=177&offset=1


 
 Return to top of page · Post #: 32 · Written at 9:45:31 AM on 22 February 2018.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5389

Sometimes you can predict, by which winding fried, what scenario caused it. I must say the at it is only in recent times, that I have seen more than one transformer fail in a short period. Up until around 2010, it was only a couple.

There is one variety used in the 132L & several other Philips sets around its era, where the windings exit the side & mine was one that did it: I was saved.

I would note that when repairing: Here there is only one standard be it an internal, or commercial repair. I know that wax paper capacitors are not reliable and leaving them in, is tempting fate and will adversely effect the performance. Experience has and still is in practice constantly reminding me that wax paper caps leak, more often than not well below 1Meg. So it is actually pointless and risky fault finding with them & tired electrolytic caps anywhere: They are most likely to be the problem. The price of a new cap does not justify leaving a leaking cap in circuit.

Methodology is everything. In a commercial fix, my business depends on making the thing as reliable as I can. Rework is not good.

Do note that If you have old test equipment: They use the same parts. Viz: Avo 7X; two Palec VCT; Heathkit Oscilloscope & Grid Dip meter; Leader Sig gen (several) (Oil filled caps); Peak 200H (Audio output cap) Vesta Ignition Coil Tester: Are all bits of test equipment that I have had, or have had come in, where the old caps & other components in some, have failed.

Marc


 
 Return to top of page · Post #: 33 · Written at 12:21:30 AM on 23 February 2018.
JamieLee's Gravatar
 Location: Clare, SA
 Member since 27 March 2016
 Member #: 1894
 Postcount: 510

Whoops, so sorry guys not oc but dead short! It has continuity, zero ohms straight through it, killed the rectifier valve too!


 
 Return to top of page · Post #: 34 · Written at 9:13:00 AM on 23 February 2018.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2476

You didn't use a DBT, did you?


 
 Return to top of page · Post #: 35 · Written at 9:25:58 AM on 23 February 2018.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5389

Seen that & reason Number1 for never powering an unknown set. I did note recently the effort of two, one who was told never to power. That did not fry the transformer but it destroyed an #80.

Old unused electrolytic's can be open but more often than not they present as a short after loosing "form" (polarity). Never be of the illusion that only B+ goes short. I have seen the 5V rail of a 5Y3 short & it only presented when DC was generated.

Turning a 5Y3 sideways can cause a spectacular fail (short) # 80 should do the same.

If its a B+ short some 6X5's were notorious for shorting. disconnect all B+ electrolytic caps, & beware if its got top trimmer IF's. One trimmer screw is often on the primary of the IF can feeding a plate. (live) & there can be a short if the can top is damaged.

Marc


 
 Return to top of page · Post #: 36 · Written at 3:09:10 PM on 23 February 2018.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 2174

Um when did 2FC change its name. When was it not used as a station marker?


 
 Return to top of page · Post #: 37 · Written at 3:15:04 PM on 23 February 2018.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 2174

702 ABC Sydney was Australia's first full-time radio station. Using the call-sign 2SB, the station went to air at 8.00pm on November 23, 1923. Another station, 2FC, which later became Radio National, went to air two weeks later. As a result of listener confusion, 2SB was later renamed 2BL. Both stations became part of the Australian Broadcasting Commission (ABC) when it was formed on July 1, 1932.

Although over half of programs on the station's in the early years were music-based, there were also sports programs (including the famous "synthetic" cricket broadcasts), along with live-to-air drama, and later, schools broadcasts.

From 1932 to 1936 ABC stations in each State produced their own news bulletins, although they were mostly read directly from the newspapers. It wasn't until 1947 that the ABC established its own independent news service.

Over the years, there were two significant shifts in program focus. The first came in 1946 when 2BL became a 'National Programme' and featured serious items and 2FC carried an 'Interstate Programme' which had a lighter emphasis. From 1946 until 1988, 2BL also carried parliamentary broadcasts.


 
 Return to top of page · Post #: 38 · Written at 5:55:56 PM on 23 February 2018.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2476

Pity ABC news is not still independent.

"Without bias or agenda!" ??

Who do they think they're kidding?


 
 Return to top of page · Post #: 39 · Written at 7:11:46 PM on 23 February 2018.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7395

A lot of older people still refer to 2BL as 2BL. It was played over the MATV system at a hospital I used to work at and for some reason, if it wasn't available, I'd get a lot of complaints from the patients. It's callsign, as far as I know, is still 2BL but the station ident is ABC 702. 2FC is now 2RN and the station ident is Radio National. Parliament is broadcast on 2PB (684kHz I think) and the station ident is ABC News Radio.

On the issue of ABC bias - Emma Alberici is in hot water for seemingly inaccurate reporting.

https://www.theaustralian.com.au/business/media/abc-revise-emma-albericis-analysis-after-removing-it-last-week/news-story/3a85134ee3932e4b4e1f4a90152838a8 (Paywall)


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 40 · Written at 7:43:31 PM on 23 February 2018.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2476

Did it have one of those black boxes that put the radio callsigns on the video channels?


 
 Return to top of page · Post #: 41 · Written at 8:01:00 PM on 23 February 2018.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7395

Yep, we had four radio stations at that place and there was a character generator to display the callsigns on the tellies - one for each station. They were in jiffy boxes.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 42 · Written at 8:02:10 PM on 23 February 2018.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6761

as far as I know, is still 2BL but the station ident is ABC 702

Yep, officially its callsign is still 2BL:

https://web.acma.gov.au/rrl/licence_search.licence_lookup?pLICENCE_NO=1156662/1

and what was 2FC is officially now 2RN.


 
 Return to top of page · Post #: 43 · Written at 7:29:01 PM on 24 February 2018.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 2174

Ok I actually got to this one today. Fixed the wire through the speaker. Thankfully no damage done. Under the chassis wasn't as bad as I was expecting. Still he kept the old caps in service and used them to terminate the new ones omg not good. He must have buggered up the band change switch as he put a dummy switch in its place and got it to run on AM only. Well I thought considering it's running very strongly now I thought I better replace the dummy switch with a double pole switch seeing as it had no on/off switch and install my new cotton covered power cable. This little radio is performing very strongly now even though no short wave. Oh well I can take that later hey.

Reliance Skyraider
Reliance Skyraider
Reliance Skyraider


 
 Return to top of page · Post #: 44 · Written at 6:59:37 AM on 25 February 2018.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7395

Photos uploaded to Post 43.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 45 · Written at 9:21:45 AM on 25 February 2018.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 2174

With regards to the positioning of the transformer under the tuning gang , this radio shows no sign of interference from it. In fact it's a very strong and clear performer.


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

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.