Power Transformer Problem on Kriesler 11-71
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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Thanks for the offer Brad, but I can't see your email in your profile. My email is mailbox at graphicgraffiti dot com dot au so if you send a message to that I'll reply to that with the photo.
I really want to get this radio working, and thanks for all the help so far.
Thanks,
Tim.
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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I thought I'd do this to help you out. I photographed the whole circuit with my SLR camera on a tripod. It's high-resolution so you can zoom into every part of the circuit, probably the next best thing than having the radio in front of you.
http://www.graphicgraffiti.com.au/storage/radio_circuit.jpg
It's 1.5MB, so I hope that's not too bad as it's a huge panorama shot of the circuit. It's very clear, so you should be able to pick everything out. The terminal strip in question is on the far left with the capacitor and two resistors. See how those wires just terminate there without anything else connected?
If you need anymore photos, don't hesitate to ask. If I could get this working I'd be absolutely delighted.
Thanks,
Tim.
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5257
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I have saved photo & will have a look at it in an Imae program.
Marc
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5257
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Information & comment sent to Brad
Comments also added to photo
Marc
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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So just wait for Brad to post?
Tim.
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7306
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Tim, Marc sent me some info via e-mail. Do you mind if I pass it on?
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A valve a day keeps the transistor away...
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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Hi Brad, Go ahead. I think I posted my email address above.
Thanks,
Tim.
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7306
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All sent. The attachment is a big one so it may take a few minutes to download.
On an unrelated subject, you guys will notice later tonight (or next time you visit) that two extra functions have become available in your posts.
The first is post signatures. If you entered a signature when you registered it will appear in all posts you make automatically in future. If you didn't include a signature when registering don't worry. You'll soon be able to update your details which will allow you to include one, amongst being able to change other things relating to your account, such as password and e-mail address. This will be the next thing I add to this website.
The second thing is a link at the bottom of your posts that will allow you to edit your posts after they have been posted. This has been a very popular request from members and should be working later tonight. So if you have made a post recently and have been niggled by that spelling mistake that stands out like a sore toe, you'll be able to fix it up licketty split.
These two features will be rolled out across all seven forums at the same time and will be available to all members.
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A valve a day keeps the transistor away...
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5257
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Brad I welcome the edit function, there are other sites with this and it is extremely useful. Especially if you realise the grammar is crap, or you have left out, or need to add more detail.
As we need the detail in the posted image; I left it much as it was, to avoid the losses we would have incurred, had I compressed it further.
Marc
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7306
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There's a slight delay with the edit function. I will have to finish working on it tomorrow night. Still, we've all waited this long, ay.
It's best to get things like this right the first time because it involves the security of the database.
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A valve a day keeps the transistor away...
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5257
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Antique Radio Forums will only allow edit if you are logged in, and you can only edit your post.
Marc
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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First off, thanks Brad for sending that through and I will be looking forward to the new functions (the edit was a nessesity...)
Anyway, on to the photo. Thanks Marc for taking the time to look at it. Much appreciated. Some of the points you circled (including the suspected cut) were panorama errors (sorry about those, should have had a better look). Anyway, with all these errors do you recommend that I just re-solder everything? Was there anything wrong with the blue cable from the transformer going to a lone solder lug? Those capacitors up the top that overlap each other are like that in the original Kriesler diagram. Should I just insulate it with heat shrink or something? Did all the resistors look fine?
I am going to replace the power plug, but I wanted to get it actually working first.
As you've mentioned, this is my first restoration so I'm learning along the way, and I'm taking your help as advice, as you also mentioned. I'm grateful to have this help as I wouldn't be able to do it without it.
Thanks again,
Tim.
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5257
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The Blue wire is the 200 to 220 V Tapping on the primary.
The Cable is attached to the 240V to 260 V Tapping. All good.
The only way to tell, other than if its cooked, with resistors is to measure them.
One of the problems with photo's is that they are two dimensional. This is why having these things in front of you, can expedite proceedings.
Jaycar has spagheti sleeving, but hid it in with the clamps, in the cattle dog? I would aquire some & put on the wires noted.
At this juncture I don't think soldering is the problem. I am more and more looking at something being shorted. The only thing that looks shorted, ( bearing in mind photo cannot percieve proximity & depth, in the same way two or more eyes can) is the Capacitor on the plate of the 6AQ5, which appears to be going under the copper wire.
That definately needs sleeving. If that is not the short, one needs to look deeper into the components.
Marc
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Location: Bentleigh East, VIC
Member since 25 October 2009
Member #: 568
Postcount: 39
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I have no idea what is wrong with it. Could it be that the Transformer/Speaker Transformer is just stuffed?
Thanks,
Tim
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7306
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G'day Tim,
You noted in your first comment that there was smoke coming from the power transformer when you tried powering up the radio. Did you get a chance to replace that yet? If not then that is the first thing to do, even if it takes a while tracking one down. The 11-71 was a fairly popular radio and they can be bought very cheaply. I would recommend getting hold of another set and then combining the two sets to make one good one. IE: Select the best cabinet, best looking chassis, the operational power transformer, etc and go from there.
The next question would be: do you have some basic test gear? You won't get far without a multimeter, digital if possible as their internal resistance is higher, producing a more accurate reading.
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A valve a day keeps the transistor away...
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