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 I'm Kriesler OCD that's for sure
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 Return to top of page · Post #: 1 · Written at 8:12:57 PM on 12 October 2019.
Vintage Pete's avatar
 Location: Cromer, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1050

Can't help my self
I picked up another Radiogram today, It's a 1962. 11-95 this time, awhile back I restored a 1960 , 1177 which Is a beautiful Radiogram that is in constant use , so this new Kriesler I picked up today which is the 11 95 is just for some fun and something interesting to play around with for awhile . No intention of restoring it as I don't have any time ,but I'm happy to just play around with it for a bit of fun Pete


 
 Return to top of page · Post #: 2 · Written at 9:15:04 PM on 12 October 2019.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5262

Those Multisonics usually sound very good.


 
 Return to top of page · Post #: 3 · Written at 11:42:42 PM on 12 October 2019.
Flukeoneseventyfive's Gravatar
 Location: Laidley, QLD
 Member since 16 September 2015
 Member #: 1799
 Postcount: 99

I picked up a 11-97 multisonic a few weeks back, Heather seen it for $20.00
Looks ok.
But it was dead, replaced the Caps, The 6CA4 was giving me grief, some times I would have the 300 volts on HT1, other times I wouldn't, I found that a tap of the valve would change the voltage, finally found one in the collection of valves, it took me a while to figure out it was the rectifier valve, I disconnected all the different stages of HT supply and removed all the valves, tested all the components in those stages.
The radio wasn't working, well there was a lot of noise, but no oscillator working.
Found a broken wire to the tang of the oscillator coil, fixed that issue and now have radio working,although the programming on the radio stations around the area, leave a lot to be desired, at night the interstate stations and central Queensland have better programming. the head for the turntable is missing and a few other bits for the turntable arm, so chasing them, so listening to records is out for a while.
Plugged in a walkman, the sound is brilliant, I have a lot of 30's to 70's programing on the unit, the 11-97 has six speakers, two of them are electrostatic speakers, very impressed, but moving the chassis in and out of the cabinet, I must have flexed the chassis and the dial glass broke into five pieces. The glass that sits above the tuning dial, was broken when we picked it up, we found a section of it in the cabinet, maybe it had stressed the tuning scale glass when it was broken ??
I am getting a loud crackle ever now and then, Mica caps ????

Cheers Peter.


 
 Return to top of page · Post #: 4 · Written at 7:49:14 AM on 13 October 2019.
Vintage Pete's avatar
 Location: Cromer, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1050

Hello G , Hello Pete,
Hmm yes mica, when I rebuild the 11 77 I replace every Cap and every resistor but not the mica . After start up there was crackle in the speakers and it was loud.
So I then replace all the mica and the sound and performance was superb. After chatting to Ian about this issue ,he told me that now the time has come where we are seeing mica issues too.
How's life up the hill Pete? I've not heard from you , pete


 
 Return to top of page · Post #: 5 · Written at 8:28:07 AM on 13 October 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1291

Crackles:

1. Turn volume to zero. Is crackle still there? If so, it's in the audio amp, if not, the tuner.

2. 6GW8s commonly crackle.

3. Mica caps are OK unless there is a DC voltage across them. After many years the silver migrates across the mica surface, under the influence of the voltage. No need to replace any micas that are across coils or similar, they will still be OK because there is no DC voltage. Micas in grid 1 circuits with only a few volts across them will also usually still be OK.

4. Early 6M5s made by Mullard with the flat glass base (you'll know what I mean when you see it) had silver plated pins and the silver migrates from G2 to G1 across the glass. More than a crackle usually, bangs and pops. You can scrape the silver off the glass for a temporary fix.


 
 Return to top of page · Post #: 6 · Written at 9:52:47 AM on 13 October 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3698

The worst caps I have had anything to do with are branded "Micamold". and their resistors are not much better. "Micamold' is actually a brand name and most of those caps are not Mica.

If I change caps I will check and change resistors as I go: That saves a lot of rework: Rework can cause damage. If a Mica or Ceramic cap has an end free I will insulation test it. American Mica caps generally From what I have experienced & seen on their forum have a very high attrition rate from migrating Silver. Lead free solder also has migration issues.

Also check for bad solder joints by probing with a chopstick and look for solder etc floating around. Dirty or worn volume control tracks can also cause that problem as well as bad sockets. If you think is tracking from Silver, dont forget to clean the top of the socket especially if its a flat Bakelite one. Socket failures like sprung pins are not uncommon albeit last week I did toss an internally broken socket.

Krieslers have the highest attrition rate of speaker transformers. Do make sure that the plugs are OK as an open circuit in the secondary can cause the transformer to "ring" and that will cause the primary to generate EHT (ringing choke) and that will flash over either externally, or within the valve.

My last experience with 6GW8 was all bad. It was in a Thorn Stereogram. One decided to short. That stressed the metal rectifier (metal rectifiers are fickle & not known for being overly reliable): So it went short. That then fried the HT secondary (photos have been posted elsewhere). Do again make sure al is good on the primary if only one channel is doing it. If the plate goes open then grid 2 becomes the plate & cant handle the current & it fails.

I have tried to convince a few that an RCD and / or fuse on the sets primary the transformer is often totally useless, if there is a fault secondary side as the transformer acts as an isolation transformer. The RCD will see no fault, and the fuse will not fail unless there is excessive current & often there is not.

I often find that Acid is the only real way of getting off the Silver totally & effectively.


 
 Return to top of page · Post #: 7 · Written at 7:34:29 PM on 13 October 2019.
Flukeoneseventyfive's Gravatar
 Location: Laidley, QLD
 Member since 16 September 2015
 Member #: 1799
 Postcount: 99

G'Day Pete, Ian, GTC and Marcc.
I turned the set on this morning, it has been cold mornings the last few days, and no crackles, no noise, turned the volume down, no cackles.
I was looking at putting a resistor inline with the output of the rectifier as a way to protect the rectifier and the transformer, any ideas with doing that.

Pete, I picked up a few TV's from Matt in Stanthorpe, we had to shuffle around our weekends, due to the bush fires around that area, he was very lucky they got the fires under control down there.

This week was only a four day working week, but flat out. Dropped the ute off for service on Tuesday afternoon on the way home from work, in Ipswich, got the loan car and drove home, heard about massive bush fires in Mulgowie and Thornton major vegetable farms and national parks, they are around 15 to 20km from my place. as we got closer to Laidley, we could see the massive plume of smoke fro those areas.
Thought we might sneak around the back of laidley township, got to an intersection and it was blocked by police, could see a massive fire front burning just east of Laidley township.
So drove through town and on to the road that goes to my place on the mountain, and another road block. police officer said they didn't know how long but the mountain was evacuated and no one was allowed up.
He suggested we go to the civic centre, we went into town and just made the local takeway, as they were closing, got something to tide us over, went to the local park across the road from our old house, near the center of town and sat at a table watching six water bombing helicopters hitting the fire front coming up the western side of the mountain. did that until dark and then tried the road up to the mountain, still blocked, got a shower of rain for about a minute, not sure where it came from, but it didn't help much.
Ended up at the civic center and very well looked after, impressed, the police, council and the QFES were brilliant. they got the fire under control and we were able to return home around 8:30 after they check for spot fires and energex checked power lines and poles.
so we went home under a watch and act, didn't get much sleep there was gale force winds all night.

We got around 10 mm of rain over Friday Saturday, haven't had good rain for over a year, the dam has been empty for over three years.
don't have grass on the property, only dirt and dust. I work in Brisbane and have people in Brisbane telling my how dry it is because their lawn is going brown, I just shakes me head.

Cheers folks.


 
 Return to top of page · Post #: 8 · Written at 12:21:34 AM on 14 October 2019.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1074

Sounds like you were lucky in the midst of fires and drought. Hopefully it will rain some day.


 
 Return to top of page · Post #: 9 · Written at 11:08:17 AM on 14 October 2019.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5262

the dial glass broke into five pieces.

HRSA member Michael Raanan makes dial glasses. If you can supply him with the wreckage to use as a template he'll probably be able to do it. raanan.optusnet.com.au


 
 Return to top of page · Post #: 10 · Written at 8:41:45 PM on 14 October 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3698

Forgot, especially with old valves; It does pay to take them out & put them back in if its been sitting a while. Pins & sockets do corrode.

Perhaps on that. Metalised Philips especially and most based valves generally; Avoid wobbling them & pulling them out by the base. If possible lever them out. I have already replaced a socket this month that has had the wobble treatment.

The Philips with lost Metalisation, or a broken bond between metalisation & grounding pin, can usually be repaired.


 
 Return to top of page · Post #: 11 · Written at 9:28:51 PM on 14 October 2019.
Vintage Pete's avatar
 Location: Cromer, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1050

Flukeoneseventyfive

Pete, what TV's did you pick up ???
Hey I'm finally moving out of Sydney, going to Albury!


 
 Return to top of page · Post #: 12 · Written at 11:34:18 PM on 14 October 2019.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 1403

Vintage Pete wait till you see my restored 11-7 . The case was cracked so I'm getting it professionally spray painted, making a new speaker grill as well. I will post photo's when finished. I love their sound.


 
 Return to top of page · Post #: 13 · Written at 10:00:02 AM on 15 October 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3698

Albury: Your getting close to me.


 
 Return to top of page · Post #: 14 · Written at 8:25:03 PM on 15 October 2019.
Vintage Pete's avatar
 Location: Cromer, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1050

Carl , yeah pop some pics on, I'm a Fan of Kriesler valve stuff.

Marcc, yep moving to Albury and I'm looking forward to it,

Pete


 
 Return to top of page · Post #: 15 · Written at 10:20:56 PM on 15 October 2019.
Flukeoneseventyfive's Gravatar
 Location: Laidley, QLD
 Member since 16 September 2015
 Member #: 1799
 Postcount: 99

Thanks for the pointers folks. not sure why, but the unit is as quiet as, for the last few days.
I know Pete, all the good tv's are down in Victoria, and you are getting closer.
I picked up a Kriesler Envoy 25, that's the one with the sliding and lockable doors on the front. a HMV Trent. a phillips, not sure of the model, around 1963-64 and a Kriesler Stereo Multisonic tv theatre radio gram 121-79A Ch= 79-15 (TV), Ch= 89-20 (RG), weighing in at 101Kg
a few pic's here my blog to keep track of day to day happenings with the growing collection, don't laugh too much, I get an hour for lunch at work and end up adding more to the site, during the break.

https://vk4khp.wordpress.com/2019/09/30/interesting-trip-to-stanthorpe/


 
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