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 Kriesler 11-7 Battery Powered
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 Return to top of page · Post #: 1 · Written at 10:07:17 PM on 9 August 2011.
Cherokee's Gravatar
 Location: Maclean, NSW
 Member since 9 August 2011
 Member #: 978
 Postcount: 7

Have been given a DC powered Kriesler 11-7 with an on chassis vibrator in a shielded can. The 5 valve lineup is not at all like the 240 VAC unit, with the audio output and last IF amplifier seem to use the same valve. Valve type numbers are unreadable at this time. The case is in good condition but the instructions under the base are painted over in yellow. Does ayone have a cct diagram or infomation eg 12 or 32 VDC


 
 Return to top of page · Post #: 2 · Written at 11:27:58 PM on 9 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239

Number does not compute for an 11-7

11-7 is listed in AORSM's as Mains. The only Vibrator set carrying an 11is 11-5 / 31-5

Most of the vibrator sets were 31- ** check the number on the vibrator, as well as those valves that have numbers

The earliest of the listed sets that was not a 31 has an 80 rectifier. It is a UX4 base.


 
 Return to top of page · Post #: 3 · Written at 8:33:31 PM on 10 August 2011.
Cherokee's Gravatar
 Location: Maclean, NSW
 Member since 9 August 2011
 Member #: 978
 Postcount: 7

Checked the valve numbers as far as I can see them, 1U5G rectifier, 1K?G Audio output and final IF amp, 1M5G 2nd IF amp, 1M5G 1st IF amp, ECH35 Mixer and Oscillator. The 11-7 is on the base of the case, so some time in the past it may have been replaced. There is evidence of repairs in the past, the HV electrolytics have been replaced along with the power cable.Thanks for the info Marcc.


 
 Return to top of page · Post #: 4 · Written at 8:58:49 PM on 10 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239

I suspect fiddling or case breakage issues. That line up looks familar I will have a look in AORSM's

If someone has been in there it is a good excuse to look at it carefully.

Marc


 
 Return to top of page · Post #: 5 · Written at 8:59:04 PM on 10 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239


 
 Return to top of page · Post #: 6 · Written at 10:43:36 PM on 10 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239

I suspect that this is either a 31-1 or 31-2 The circuits are slightly different.

Both are 6V The vibrator should be V5124. Syncronous I would say, as the set has no rectifier.

ECH35; 1M5; 1M5; IK7 1L5. These are all octals 1U5 is a 7 pin minature diode Pentode

Feedback ARTS&P label number & look for 1946 or 1947 on the speaker or tuning gang

Marc


 
 Return to top of page · Post #: 7 · Written at 7:09:00 PM on 11 August 2011.
Cherokee's Gravatar
 Location: Maclean, NSW
 Member since 9 August 2011
 Member #: 978
 Postcount: 7

Chassis stamped as 070455.
ARTS&P label is 21360 (damaged).
Tuning gang has no date I can find but the numbers are 18225 over 15-12.
The speaker is a Rola with 84?5 printed on the magnet, 30 and an 8 on the rim.
The vibrator is V5124, as you suggested.
The last valve is a 1L5G (my mistake)
The set came from a property 30 Km south west of Glen Innes NSW, I was given it as I have a few other old radio's, the case is polishing up after a 2000 wet and dry light cut (it was really sun damaged and powdery) now looks really nice.
Thanks Marc
Jon


 
 Return to top of page · Post #: 8 · Written at 10:11:39 AM on 12 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239

Forgot to mention that the ARTS&P label is likely to have a letter pre-fix eg. "C" and be of a particular coulour.

That info I think is on HRSA site. That should also give an indication of its age.

However, it is looking more likely that it is a 31-1 or 2

I have the circuit of what I claim.

The padder caps on most vibrator types have an atrittion rate due to the spikes generated. do not use anything under 1000V and expect the existing to be shot.

It may pay to check the sound deading material inside the vibrator. This is Formaldeyde based and turns to powder. That can cause shorting issues as can any rubber insulation internally.

Do not attempt to turn it on until the old electrolytics & paper caps, bad wire, etc have been replaced & the circuit checked against the printed one.

Marc


 
 Return to top of page · Post #: 9 · Written at 9:50:28 PM on 12 August 2011.
Cherokee's Gravatar
 Location: Maclean, NSW
 Member since 9 August 2011
 Member #: 978
 Postcount: 7

Excuse my lack of knowledge but the ARTS&P sticker is missing and not the damaged label 21360 as this is a riveted cardboard strip on the rear of the chassis, there is no sticker that I can find anywhere on the chassis.

How do I obtain a circuit?

What is the difference between a 31-1 and 2?

Some of the wiring is old rubber insulated and some is new plastic insulated, but both seem to be installed at the same time.

Checked the HT supply rail and shows up a typical capactor charge up response, the heater cct shows a low ohms reading as expected.

Will check the vibrator this weekend


 
 Return to top of page · Post #: 10 · Written at 10:55:34 PM on 12 August 2011.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7290

It's an old article now but there is information here on how to date radios.


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

 
 Return to top of page · Post #: 11 · Written at 11:32:58 PM on 12 August 2011.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5239

The rubber wire is expendable and easily delt with. Suppliers such as EVATCO have cloth covered wire should you not want to use plastic.

Not uncommon to have both plastic & rubber. normally the plastic was iinitially on the speaker transformer, then expanded in use through the fifties.

If the set is old & the electrolytics caps are not of a recent type or leaking, I would not trust them as far as I could throw them.

I fix commercially at times, and have fixed a lot of sets over the years. Experience says get rid of paper & electrolytic caps & check resistors as you go. Saves greif & re-work later. I have gone through sets & instruments, where every resistor & cap have failed.

The wiring of the two sets is different. The only way to tell in your case & from where I am sitting, is to get the two circuits & see if one matches what you have.

Brutal but... Short of having a number stamped on the chassis or the real Kriesler data...

As I wrote I have circuits. I can send direct, or to Brad to forward.

Marc


 
 Return to top of page · Post #: 12 · Written at 4:22:15 PM on 21 August 2011.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7290


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

 
 Return to top of page · Post #: 13 · Written at 5:11:18 PM on 21 August 2011.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6678

^ Blank post, Brad, or is this a bug?


 
 Return to top of page · Post #: 14 · Written at 6:57:39 PM on 21 August 2011.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7290

Definitely not a bug, just my laziness. Smile

Soon I will finish the script for a comment delete. Wink


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

 
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