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Kriesler model 11-99
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Return to top of page · Post #: 1 · Written at 6:35:19 AM on 22 January 2019.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 79
Hi All, just wondering if any one out there has a full service manual for the Kriesler valve radio model 11-99.

Return to top of page · Post #: 2 · Written at 6:52:01 AM on 22 January 2019.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6687
Dunno if there was ever such a thing as a full service manual, but this should get you out of trouble: https://www.kevinchant.com/uploads/7/1/0/8/7108231/11-99.pdf

Return to top of page · Post #: 3 · Written at 8:43:52 AM on 22 January 2019.
	Bowler Location: Bongaree, QLD Member since 26 October 2018 Member #: 2308 Postcount: 79
Many thanks GTC.

Return to top of page · Post #: 4 · Written at 2:42:05 PM on 22 January 2019.
	Ian Robertson Location: Belrose, NSW Member since 31 December 2015 Member #: 1844 Postcount: 2371
Later 11-99s had the 6V4 replaced by a silicon diode.

Return to top of page · Post #: 5 · Written at 11:36:35 AM on 30 January 2019.
	Wa2ise Location: Oradell, US Member since 2 April 2010 Member #: 643 Postcount: 830
Looking at that schematic, I noticed that the power transformer secondary is 115VAC, and the rectifier tube is connected as a half wave rectifier. In the USA this design could have been a "hot chassis" radio, aside from the heater supply. If the tube rectifier was to be replaced by a silicon diode, I'd make it a bridge rectifier to get full wave rectification. Less hum and easier on the power transformer. This assumes that both ends of the 115V secondary can be isolated from the rest of the set. I've seen some power transformers with this secondary directly connected to the heater secondary.

Return to top of page · Post #: 6 · Written at 1:32:34 PM on 30 January 2019.
	Ian Robertson Location: Belrose, NSW Member since 31 December 2015 Member #: 1844 Postcount: 2371
Yes I'd always thought the half-wave rectifier was a bit strange. Must have been easier to wind the transformer that way. The 11-99 was in production for a long time, but it ceased after Kriesler's TV line went all solid state. Prior to that the 11-99s were using up out-of-spec 6GV8s - a TV vertical tube - in the audio. The 11-99 must have been close to being the last valve/tube mantle radio in production anywhere in the world. Whoever assigned the model number probably knew this would be the last one. The design was definitely 100% in-house, not based on an O/S design.

Return to top of page · Post #: 7 · Written at 7:08:00 PM on 30 January 2019.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7301
This model does seem to have been designed and made on a shoe-strong budget though despite the half wave rectifier there's no discernible hum and it does sound good for a receiver with a small loudspeaker in a fairly cheap plastic cabinet. Definitely the last valve set made here and from what I can gather from probing the US and GB forums last year, probably the last in the western world. On Ebay recently, there's been a couple of these on offer and the serial numbers are in the 20,000s. So plenty were made and sold. ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

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