In the related discussions I started on the UK and US forums some time ago now, Britain and America has long ceased production of valve radios during the life cycle of the 11-99 and some users on both forums were amazed that Kriesler was still at it in the mid 70s.

40,000+ radios has to be a record in its own right too. They must have been quite inexpensive.

I have found old capacitors were up to 60% over their marked values. If you can measure the capacitance of your old capacitors, then you will know what was actually in circuit. Maybe the old ones were bigger than your replacements?

Bigger is not always better. If you can obtain the datasheet for your rectifier valve, it should state the maximum value of capacitance that is safe to use with it. Apparently too much capacitance will strip the coating off of the cathode.

Well I suppose the 11=99 would have been more expensive to produce, hence more expensive, however they definitely sound much better than any battery or mains powered transistor radio, especially for listening to music, therefore would have had a market with people whose older valve sets had died and wanted a replacement which at least sounded at least as warm and rich as their old one, like musical instrument amplifiers, valve amps for guitar still out-sell transistor amps and as guitarist, the fact is nothing comes close, to the tone, punch, good distortion, versatility and overall warmth of a valve amp. Which is why many valve radio's survive, as people refused to throw them out, instead holding on to them hoping somebody could fix them eventually. I surely think the 11-99 would have been well worth the expense, for anybody who ever bought one. They are a basic, but none the less impressive little set.

Interesting, I wonder where I may find a valve data sheet? Swwms these radio's had at different times, vastly different values for the filter and reserve capacitors. I just wonder which is more or less desirable. I.e. More s in 47μF or less as in 22μF, s the 11-99 runs on a lower voltage, 115volts whereas most other valve radio's use up to 250=300v...

I wonder where I may find a valve data sheet?

https://frank.pocnet.net/