HI,
A friend of mine has a Titan Tiny Radio and is looking for a clear hi res photo of the dial face plate.(or even one to buy) It is a rectangular shape, not round.
Please advise if you have one of these rare radios and can take a photo of the dial face plate.

thanks in Advance.

I can remember one of those & its a case of trying to think where it was. Probably one of the collectors. Have circuit.

http://messui.polygonal-moogle.com/valves/SC200201.pdf

In America, hot chassises are very common, and we are used to being careful with them. And we have had power transformers to run heaters, but direct to line for the B+ rectifier and its return. This fools beginners. And as Aussie plugs are angled, like (/ \) instead of the American parallel blades that allow the plug in either way, presumably if the Aussie powerpoint is wired correctly, the hot chassis's B- "ground" should be at ground potential. As the Aussie plug only goes in one way.

Brad being an electrician would be better re regulations, but from what I see things are very different here. There seems to be some debate about 115 VAC being safer? Secondly here house wiring etc. is a protected trade and if you have no licence, you don't touch it. That is not to say there are not mistakes. Yes the plug is polarised & can only go in one way. The proper LV 12VDC plug is the same (its a "T") & some have the big & small like your NEMA ones; But the plug has the big & small pins, so cannot be reversed either.

I recently upgraded the system here & I allowed around $A1000 for modifications and putting things right: There were mistakes & wrong wiring found.

The regulations clearly state which pin is Active, Neutral & Earth & many sockets are colour coded, to help avoid tradies getting it wrong. With the mandatory fitment of Residual current devices (US = GFCI), the Neutral (common there I believe) is separated from earth & floats as an entity. This, to me does not change my opinion that, once out of the cabinet, the "Hot Chassis" radio is not in any way intrinsically safe.

We do get a few European sets that are hot chassis, or have live printed circuit boards. And then there is the less common AC / DC type radio used pre-state grids, where some town generators were DC.

Idealy on AC / DC radio's etc. One should use a double pole switch & break both circuits. What you call Mobile homes have to have that type of switch on utility power (mains).

The problem with AC/DC sets (and there were a few brands here in Australia that made them, including Airzone's famous RadioStar of 1937 was produced in this variety) is that quite often they were wired to a bayonet lamp type plug which is not polarised, or would be plugged into a power point that was wired the wrong way around. Under these scenarios, the chassis is at mains potential. Backs on Australian radios were rare and the RadioStar didn't have one on any variation of it. If you touched the chassis when moving the radio to dust the sideboard - BZZZT! Same if you wound adjusted the tuning with wet fingers and water from your fingers came into contact with the grub screws on the knobs.

Looking at an installed power point, active is at top left, neutral at top right and earth is the vertical pin at the bottom. It's illegal to install a power point with the socket upside down or going to one side. Even many electricians don't know this rule, but they should. It's been in 'the bible' for donkeys' years.

There's been a lot of debate in Silicon Chip in recent years about why it is possible for a landlord in New Zealand to perform alterations and additions on the hard wiring of his own house but the same is illegal across Australia. The reason is fairly simple I think. Whilst many game we play may have been exposed to this type of work in the past and may have enough knowledge to perform basic work safely and inline with the SAA Wiring Rules, most people really don't possess this knowledge and when they carry out illegal work they often skimp on the hardware used to extend their household wiring. I've seen too much of it to support a relaxation of the rules.

Even changing a dud light switch could be costly - around $23,000 in NSW. Other states would have similar fine structures. I would concede though, the chance of being caught is very slim.

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

Hi
If you are after a tuning dial for a Titan Tiny then I can supply you with one. No need to go to the trouble of producing a sloppy replica from a picture. Give me a call 0413 282 083.
Kind Regards Scott.

QUOTE: Looking at an installed power point, active is at top left, neutral at top right and earth is the vertical pin at the bottom. It's illegal to install a power point with the socket upside down or going to one side. Even many electricians don't know this rule, but they should. It's been in 'the bible' for donkeys' years.

In America, there's been the argument whether to have the ground pin up top (if a sheet of conductive material falls down the wall, it will hit the ground and not the hot and neutral), or ground down (if the plug starts to fall out the powerpoint, the ground will be the last thing to disconnect). l. Myself, if the outlet is sideways, I put it so the neutral is atop. Never with the hot atop. Anyway...

As for hot chassis sets, they used to be poorly isolated from users when in use (ie, you could reach around and touch the metal chassis, as the back got lost or fell off. Later on, they used interlock plug and socket devices, and a cabinet that insulates the chassis from the user. Take the back off, and the power cord disconnects, and the power cord is fastened to the back to make it difficult to plug the cord in without the back. And control knobs were plastic, and sometimes made to be captive so you couldn't pull the knob off if the chassis was present (usually a keyslot method).

PC power supplies are partially "hot chassis". In that the transistors and ICs on the primary side are "hot".

Australian plugtops have insulated pins these days to prevent fingers and metallic objects coming into contact. I find this annoying because the cross section of the insulated portion of the pin is smaller and has made them weaker and more susceptible to damage.

China uses the same socket but they have them upside down. Venezuela also uses the same but is earth-down but the active and neutral are swapped around (I think). All the pacific islands that use this pin pattern just to it the Aussie way because that's where the gear comes from.

PC power supplies are partially "hot chassis". In that the transistors and ICs on the primary side are "hot".

I haven't measured it myself but I am told these things run at higher than mains voltage and 3,000Hz in order for the transformer to be as small as possible.

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

All the pacific islands that use this pin pattern just to it the Aussie way because that's where the gear comes from.

-- on its way from China.

Most but not all. Some Clipsal stuff is being made here again. Not sure why but for some reason there is a local operation again. Shame that their RCD GPOs aren't amongst the locally produced items. They do not like spikes and surges and an RCD should be able to cop them and last longer than a few years.

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

QUOTE: China uses the same socket but they have them upside down.

That's because Australia is "down under" and China is on the "top" side (northern hemisphere) of the world... This way, the ground is always closer to the north pole star Polaris.

That reminds me of the times me, family and friends used to go hunting for gold in the Central West of NSW and I'd go digging for my chunk of dirt to pan out and everyone would tell me not to dig too far or I'd fall into China. Looking at a map of the world, it probably could happen but it'd be quite hot in the middle of the tunnel.

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

Hi
I can supply a brand new dial for this model if you are interested so no need to waste time making an amateur copy. Call me on 0413282083.
Kind Regards Scott.

I can supply a brand new dial for this model

What, if any, other dials can you supply?