BA is a metric pitch. The most common threaded screw was 5/32" BSW never seen BSF in a radio. American sets pretty much used Gauge screws, they will not screw into a Whitworth nut, the thread angle is different. You may find 1/8" the rods in a Kriesler Bee hive were 3/16".

If you have a pitch gauge & a bolt that will be a clue as will be the hole diameter if you try a drill bit in the nut as a gauge (it will be a lesser diameter than the bolt).

Marc

https://en.wikipedia.org/wiki/British_Association_screw_threads

Yes BA is metric - sort of!! But not compatible with M3, M4 etc as we know them.

Jim, yeah just tap them out to the next metric size.
Or, use a bigger screwdriver!!!

We look forward to seeing some pix of the finished set.

Fred.

Thank you all once again for your replies . When I have the dial globe holder I will finish it off.
I am fairly pleased with the overall result . It is still well short of a Fred Lever extravaganza!
Regards Jim

I have a range of taps & dies in Metric, small BSW and some bigger dies and UNC & UNF for tractors & cars plus the thread gauges and they do get used. There are also common water pipe taps & dies.

These can often be used to work out what a nut, or bolt actually is.

Handy to have in your situation Marc. I am aware of all that stuff and in my younger days would have used a lot of them. However my applications and lack of space means I don't have them I do have a range of metric and Whitworth taps which is about all I would normally use. There is a lot of workshop tools I miss . Although I worked for my self for a number of years most of my working life was spent working for others, they all had metal cutting guiloteens and sheet metal benders and large heavy steel benches with big solid vyces mounted on them you could wield a pretty mean hammer. The reality is as I get older I seldom have need for them anyway.
I actually wish I could find other interests. I have always done electro mechanical work from a very young age, have absolutely no interest in Sport either participating or especially watching.
Regards Jim

I am being amused by a mouse in the workshop at the moment. Its trying to eat a packet of rat bait in the middle of the floor. I think I need another black snake in here.

Despite being past retirement age (most farmers are) I do not confine my activities to just radio and never have. I still have to get at to two tractors & tighten down their heads. This is where the taps & dies are useful as some threads do need repair, or cleaning.

As mentioned in another post I did actually get to service the lathe this year, as things are pretty quite due to C-19. I even got to do a fusion weld on the mower deck using oxy & that sort of weld has not happened for ages. Even a broken fitting on the farms reticulation Saturday got fixed internally (water system is not on an Instrumentality, or statutory body system).

Plenty of entertainment, even wrote up an article on a radio to hopefully get into HRSA Radio Waves.

More e-waste, the blender thing in the kitchen is letting out smoke. 2nd item of same Brand to fail in a Month. No more from them.

Marc

I have asked Brad when he has some time to down load some pictures of the completed Empire State.
I feel it is the best I can do under my present circumstances. Not up to the standard of what many of you are capable of . But overall it is working and looks presentable. It was a case of trying to make a silk purse out of a sow's ear . However that is generally the case with these projects. Thank you all for your comments and helpfull advise.
Kind Regards .Jimb

Photos uploaded to Post 83.

Thank you Brad.
Kind Regards Jimb

That looks a bit like a formaldehyde foam gasket around the speaker. For replacement that sort of thing can often be found in Bunnings.

A lot of people like old stuff to look like its old stuff & been used. Zephyr has never been fully restored its fix as required. People like it like that.

Uses a lot less oil since it got the reconditioned fuel vacuum pump.

Jimb, it looks very nice. Thanks for sharing the photos.

Hello Marc and Robert thank you for your replys. Marc yes, I wanted to keep what was salvalagble the speaker had nothing left the rodents even chewed the coils wiring and all the cone so it ended up with a permanent magnet speaker . Overall I think the result is reasonable . I have no idea what a professional would have charged for this job. If you look at the initial pictures on page one, it was pretty awful . Cost wise less than $200.00 I will give it back to Tony later today I have put a lot of time into it and I am sure he will give me more than what I spent. I did it to keep myself occupied,monetary gain was not what my motive was . Due to this Covid19 I am not back doing all I was doing before . I am back doing electrical inspections for our local church Opshop but not back doing two mornings a week at foodcare so I have time on my hands.
Regards Jim

Marc, if you mean the thick brown gear, it's just very thick felt. Same stuff as behind the knobs on some radios.

Jim, that is far better than some "fully reconditioned" sets I have seen from "expert" restorers on Ebay.
You know them, the ones that want $1000 for some piece of crap.

I know I lose interest in sets after I tart them up and am not a collector but I do like solid work to make things presentable again.
Good job!

Fred.