26-07-2016, 09:33 PM
(26-07-2016, 08:22 PM)Old Sparky Wrote: NB I've just checked on eBay, where there is one 1821 available, but it's £89.99! Way too much - I don't think the radio's owner would pay that much in addition to other repair costs
Hi.
He needs to consider the value of the set, it will be an appreciating asset. Although silicon has it's uses I don't like the peak voltages that will be present before the rest of the valves conduct. There is no suitable way to reduce surges in this scenario, the wrongly designated surge limiter resistor wont be of much use here as the voltages could rise well above the rating of capacitors.
I no longer estimate low for vintage repairs and restorations as it weeds out those not willing to pay for a quality repair. A set of this age deserves to be done properly without the use of 1N4007's and I am sure you will agree.
Car restorers don't skimp so why should Radio restorers?
