Ever Ready Model K quiz

[Yorkie]

Huh - I've lost the plot!

I've got Trader Sheet 1098 in from of me, and the underside of the chassis shows V4 as being next to the side apron, with V3 further to the centre of the chassis. The above chassis diagram shows them likewise - V4 closer to the side apron, and V3 closer to the output transformer. Ian is right about the design error with HT being switched and not the LT. If it was indeed wired like that, the heaters would be on all the time and would soon run down the LT battery. It was the norm to switch the LT - not the HT, because if the heaters aren't on, the valves will draw no HT current. It isn't that they've made a typo on marking the switch on the circuit layout - they've made an errror in the circuit diagram, which shows the switch in the HT line, but no switch in the LT line. How very dare they!

David

[Mark R]

David
I do not think you have lost the plot, but I wonder if the model K was modified from the table model.
It does strike me as odd that V3 and 4 are reversed in the K as the underside view of the chassis and top side view correspond. That does not detract from the fact the valves are reversed.

The moral........not everything in black and white is correct!

cheers Mark

[Mark R]

Quick update on this, V3 valve base has been changed and the set works very well on both wave bands.
As I have little inclination it has taken over 2 months to do, I just need to work out the aerial coil on the back panel, it has two wonder type plugs and a loop of wire. I am guessing it goes to the frame aerial somehow.
Just needs putting back together. Thanks to John for the Knobs, I had to drill two off!
If you lot would like I shall compile a success story.

cheers Mark

[AlanBeckett]

If you lot would like I shall compile a success story.

Of course, with pictures
Alan

[Yorkie]

Quick update on this, V3 valve base has been changed and the set works very well on both wave bands.
As I have little inclination it has taken over 2 months to do, I just need to work out the aerial coil on the back panel, it has two wonder type plugs and a loop of wire. I am guessing it goes to the frame aerial somehow.
cheers Mark

No Mark - the frame aerial (L2) is used for MW, with the loading coil (L3) shorted out with the wavechange switch in the LW position, but when you switch to LW, L3 is put in series with L2 to incirease the inductance for LW. The 'coupling loop' doesn't connect to any part of the radio - it's provided to enable each end of the loop to be connected to an external aerial and earth to increase the range of the set when used at home rather than portable, and is inductively coupled to L2/L3.

As you will know, this radio was also produced as an 'all dry' battery table model, bearing in mind that in 1950, almost a quarter of homes in the UK still had no mains electricity. I can well recall the fierce opposition to pylons and overhead cables snaking their way acrosss rural England as there is today about the 'visual pollution' of wind-farms. Not everyone welcomes the coming of electricity back then!

Ever Ready, as a battery maker, along with the likes of Vidor, had a vested interest in promoting battery portable and table radios, and whereas until well after WW2, many radios had accumulators for the low tension, the production of 'all dry' receivers meant that Every Ready et al got the marker for LT, rather than the local cycle shop who often used to re-charge accumulators, but no doubt ended up selling the radio batteries too.

I was aged 11 when that radio went into production, and find the socio-economic historial aspect of radios such as this one of interst, as well as the radios themselves.

[Joe]

I too would like to hear the full tale, Mark.

- Joe

[Mark R]

David,
yes I see it now, just me not looking properly.

I shall work on success story.

cheers Mark