About: Tam

The RMB is an early Roberts battery and mains portable radio. It’s superbly engineered and as such was very easy to restore. The outward appearance might be considered a little bit utilitarian by some. The unit just needed a new paper/wax capacitors to be replaced. The power supply which included selenium rectifiers was ok once the contacts on the battery/mains changeover switch were cleaned.

The HMV 444 was a tall floor standing unit, with Art Deco styling from around 1934. It contained a chassis made by EMI and was in my opinion quite over engineered, perhaps that was a way to express quality at the time. I always wanted an early pre-war, I new this one was going to take a lot of effort, but I had time, it was going to be one of those labour of love things, so here goes……….. This unit came to me in really poor condition, with the […]

This was an interesting conversion, I had bought a beaten up old Roberts 200 radio case, missing speaker, chassis and electronics. I thought maybe it could be turned into something nice, after my experience with the RT1 I had red leather paint leftover and wanted to use it. So, I had a few ideas, and thought with the availability of modular amplifiers and Bluetooth circuits, I could built something that would integrate into that cabinet. A 4″ two-way car speaker was used to replace the missing Rola unit. The top […]

It’s been a while since my last post as I’ve been fixing up various bits and bobs for friends as well as looking at Bluetooth conversions for gutted radio cabinets. So here we are, back to the radio. This one came of Facebook, it looked interesting as it has push button pre-set tuning, which could come in handy. We don’t have many channels left on MW now, but there are easily at least 3 that I listen to regularly, so this feature would really come in handy! I didn’t take […]

Whilst on holiday in the Isle of Wight, I happened upon this little radio in a vintage shop, I found it very interesting so I after checking market prices of it on eBay, I made an offer. Interestingly, the shop keeper wouldn’t budge on price, so I took it anyway, and as I also found another identical radio on eBay, I bought and collected that one on the way home too! I’ve always found pre-transistor portables very interesting as they use really efficient little valves that run a 1.5v heater, […]

Technically this was quite a high spec radio, it has an RF pre-amplifier with a three gang tuning capacitor (one for pre-amp input, pre-amp output and local oscillator) It has a built in frame aerial and is extremely sensitive. That’s the upside. The downside was that it came to me in a very sorry state, there was lots of rust on the chassis that had to be dealt with. Three of the valves were faulty, the mixer oscillator valve broke in half on removal and the loudspeaker’s cone had been […]

This is a nice user friendly AM radio from the mid-50s. It has a built in frame aerial which means you can use it anywhere in the house. It’s a simplified chassis compared to the big PE80 that I did previously. Simple 5 valve design, single ended class-A audio amplifier. Controls are easy to use, four knobs with on-off/tone, volume, tuning and band. It does LW, MW and two short wave bands, and works really well. Restoration wise, there wasn’t much wrong with the electronics, just the usual replacement of […]

This device was purchased by a friend and passed to be for a quick safely check. I don’t really know if these devices provide any benefit to the user, but their workings are quite interesting. The general idea of the device is to generate a high voltage at a high frequency at very low current to cause stimulation of nerve endings. Note that the frequency is so high that muscles do not react. The current limiting device is a glass tube filled with a gas that will glow violet when […]

I was really lucky to be given one of these beauties. It a high end radio from the mid 1950s, with lots of SW bands, a front-end RF amplifier (most designs I’ve seen so far don’t use one) Push-Pull audio output valves, a magic eye tuning indicator and a big 10″ speaker. I’m going to take my time with this one, it’s a bit of a beast and I want to enjoy restoring it as much as I’ll enjoy using it. Like previous PYE designs, the chassis it quiet tidy, […]

This is a lovely old set with LW MW and a SW band. It’s a restoration for a family friend. Initial investigation shows that the chassis are quite well laid out. There a PSU with audio amplifer on one chassis and the radio section in the upper chassis. Work on the PSU showed lots of perished wiring, with is common for this age. The transformer looks sound and will be tested on mains shortly. 2/6 Just finished re-wiring the power supply and connections to the speaker, as the harness totally […]