There were two versions of this radio.

The first was the 11-90, which came out in 1961. The 11-99 came out a few years later (1964 - 1965?) with some changes to the cabinet styling. The 11-90 & 11-99 are identical chassis & circuit wise. The 11-99 was made right throughout the 1960's and possibly even into the early 1970's.

Compare the JR circuits for the 11-90 & 11-99 and you'll see that they are exactly the same, including the date.

Canberra Times on Trove has oodles of Kriesler ads, including these radios, throughout the 1960's.

Here is a 11-90 from 1962:

http://trove.nla.gov.au/ndp/del/printArticlePdf/131725891/3?print=n.

And a 11-99 from 1970:

http://trove.nla.gov.au/ndp/del/printArticlePdf/110444342/3?print=n.

Compare the JR circuits for the 11-90 & 11-99 and you'll see that they are exactly the same, including the date.

Well spotted. That would explain the confusion as to production years. The 11-90 has a different front of case design from the 11-99.

Also note the change of address. According to my research, Kriesler had fully moved from Newtown to Carringbah in 1965.

There were also two transistor models, the 41-29 (Transmantle) & 41-36 (Versatile).

It appears the 11-99 front of case design was based on the 41-36.

http://trove.nla.gov.au/ndp/del/printArticlePdf/131733573/3?print=n.


EDIT: Disregard above link. This one below better.

http://trove.nla.gov.au/ndp/imageservice/nla.news-page14515798/print.


http://trove.nla.gov.au/ndp/del/printArticlePdf/43737534/3?print=n.

"According to my research, Krielser had fully moved from Newtown to Carringbah in 1965."

As to the move to Caringbah, here is another gem from
the Canberra Times:

http://trove.nla.gov.au/ndp/del/printArticlePdf/104300746/3?print=n.

As a generalisation, beware of Kriesler cabinets especially Bakelite. The number on the case may have no semblance to the chassis in it.

Marc

Kriesler loved that "Triple Throat" monicker. Meant absolutely nothing, but I guess they thought it sold product.

Re addresses, here's what they listed in the Sydney phone directories of the time (only years of change shown):

1961 - 43 Alice St, Newtown. Phones: 51-0400
... and 109 Euston Rd, Alexandria. Phones: 51-6651, 51-2577

1962 - 43 Alice St, Newtown. Phones: 51-0400
... and 109 Euston Rd, Alexandria. Phones: 51-6651, 51-2577
... and Carrawa Rd, Caringbah. Phone: 5-2044

1965 - 12-30 Carrawa Rd, Caringbah. Phones: (Engineers) 5-2044, (Factory) 524-2670

1938 Cnr Pine & Myrtle Street Chippendale
M4391

Chair. P.G Tuit
(Wonder if he had any thing to do with the round Tuit?) Some people are always going to get "a round Tuit"

Tech Director Rea Weingott.

I've just had a look at my two 11-99's.

The first is serial number 16310 and uses a 6V4 rectifier.

The second is serial number 24787 and uses a silicon diode rectifier. It is dated Aug 1970.

There are no dates on the earlier one but if I'm interpreting the red three digit number on the wax Ducon capacitors correctly, it is dated around Feb/March 1969.

From the other serial numbers posted, the radios must have been on sale till at least 1972 or 1973. Chris's radio appears to be the earliest with a three digit serial number and dated Aug 1965. This would imply the radios were introduced in early 1965.
It also seems like the switch from 6V4 to silicon diode happened in 1969-70 between serial numbers 17500 to 24000.

Anyone else have a radio that they can date and provide a serial number?

I a sure I have an 11-99. I will check it tomorrow.

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A valve a day keeps the transistor away...

Damn! I'm going to have to take the back off these again and check for dates. I didn't notice them previously. Tricky little things to get the back off without breaking the tabs.

I've got an 11-90 somewhere, I'll have a closer look at that as well although I've already recapped that in the past so I may not have any luck with dates.

My 11-99 ser no 27898 has 18th November 1969 stamped on the IF cans.

11-99 ser no 38406 has 19th July 1972 stamped on the power transformer.

I can't find any dates in the 11-90 (ser no 8389) but I've got a strange habit of saving all the old caps from my radios in labelled zip lock bags and tossed in a box. I don't have any good reason for doing this, it's just something I started with my first radio when I wasn't too sure what I was doing and could go back to the start if I wanted. The wax/paper caps have 343 and 383, the electros 413. Possibly late 1963?

I was going to sell this 11-90 but seeing as 1963 was a very good vintage I might just hang onto it now

TV Collector: "The second is serial number 24787 and uses a silicon diode rectifier. It is dated Aug 1970."

Scraps: "My 11-99 ser no 27898 has 18th November 1969 stamped on the IF cans."

Something appears to be chronologically backwards there. Perhaps it's an instance of the case not matching the chassis.

I should take a look inside mine. You too, Brad.

Well spotted GTC! The serial number 27898 came from the sticker on the bottom which is in very poor condition. The 2_89_ are discernible but the 7 and last 8 were best guesses. The chassis tag shows the serial number as 20893 which makes a big difference. The IF cans are stamped 18 NOV 1969, the caps are 359 and the power transformer has very smudged 18 NOV ???? stamped on it so all the collars and cuffs match!

From the serial number and date of my 11-90 it seems Kriesler was selling about 4500 11-90's per year. Going by the serial numbers and dates of all these 11-99's it looks like Kriesler was selling nearly 5000 of these per year well into the 70's. From Monochrome625's link they were a 'Christmas Bargain' at $53.95 which compared to other household items in the add was not exactly small change. I vaguely remember around that time a loaf of bread was 28 cents, the Daily Mirror was 10 cents and my pocket money was 20 cents per week. Not bad for an old tech valve radio in the transistor age.

Mine has serial number 17412 both internally and externally.

I cannot find a meaningful date on anything, but it does have that blue ARTS&P sticker with AA prefix. Those stickers went out of use sometime in the 1960s. The various references on the Web all copy each other and say "1955-1960s Small pale blue, with dark blue letters, no prefix to the serial number." Well, when it comes to prefix, I beg to differ.

Wax caps are xx6, so I'm guessing 1966?

...they were a 'Christmas Bargain' at $53.95...

That equates to $558 in today's money!

Interesting that ad is for Eric Anderson's which went out of business the next year. There's a short history of the company in the current issue of Radio Waves.

Chris' serial number 189 now seems very odd.

As it turns out, my 11-99 was sold with a batch of radios this time last year. GTC thus becomes the sender of the first photo for 2014.

I am working on the new web server at the moment, just finishing off the programming of it before it goes into test mode for a few days. It should be online by the end of the week.

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A valve a day keeps the transistor away...

These serial numbers are interesting.

Thanks to the corrected serial number for Scraps' Radio, the rectifier change falls between serial no's 17413 to 20893. This occurred sometime in 1968 to 1969 (revised date due to new information).

The date I gave to my radio serial no. 16310 appears to be too new. It should be around 1967 or 1968. I'll have to take another look at it.

Chris's radio with the 1965 date lends support to the early serial number of 189. There may have been a zero or two before the 189 that Chris has not mentioned?

So far we have 6 numbers and 4 confirmed correct dates with a good range of age.