Telefunken Ketty R510 1975?

The Ketty has a nice space age design look that I like, that's what drew me to it, it was produced in white and orange, white being the rarer. Made by the Italian wing of the German Telefunken company in 1975, I think, not too clear on line, looks more late 60's. The design is quite poor for the service repair man, it has many traps for damage. I'll start with these as they may help anybody trying to take one apart for the first time. 2 crews at the rear and one underneath release the insides, but you'll need to pull out the voltage selector plug as it is attached to the back, it can be plugged in again after removal.
Take care not to catch your fingers on the tuning pointer as is is in an open window, and is always broken by the customer at some time during it's life. (just dusting will do it The mains cable is pushed through a hole in the rear.  DON'T attempt to remove the white front from the black housing, there is no need and if you do, you'll brake the tuning pointer. For repair work the chassis is split into two panels; the IF board, and the power supply and audio amp board, they both slide into two rail-like sockets, you'll need to either remove speaker or unsold the wires. Also the two light bulbs have two black wires, I just chopped them in the middle and re-joined them after. The panels are held tight by spring plastic clips. If you remove both panels the tuning wire will have to be released and god help you if that happens, luckily if you just pull out the power panel, you can work on the IF while still attached. The other weak point is the ferrite rod fitting, while supporting the chassis upside down they tend to break the printed circuit on IF panel.

My repair

Left side cord view (ignore cord going to speaker, that's the un-cut end)

Right side cord view (sorry wrong way up)

My set arrived from Italy in a sad state of affairs. The tuning cord had broken the mains cable had been removed and the dial pointer was broken. The good news was all the part were present. It's clear somebody had attempted to repair the set, but gave up on it at some point in the past. This is how I like to buy them as they are 1/3rd the price of a working one. As the mains voltage in Europe is either 110 or 220 volts, I first test the input circuit for resistance, just a few hundred ohms for primary winding and about 250+ for secondary.. It turns out the the on/off switch was open circuit as well as the primary winding of the mains transformer, the switch I spayed with Amberlube cleaner and it started to work again, (care needs to be taken with switch cleaner as some contain alcohol and this can ignite with the spark from a switch).

Power unit with new UK transformer fitted

The mains transformer I carefully removed from the printed circuit and found an old 12 volt one from a cassette player I scrapped many years ago, a new one would be around £8.00 to buy. It was a bolted type fitting so I drilled 2 holes in the print board to fit it. The original 500 mA fuse holder was attached to the old former, so I removed that and glued it to the top of the replacement one. Long Wave and Medium wave bands were now working, but no FM. I checked the 2 transistors in the FM circuit and one was faulty (BF173 (NPN type)) I fitted a Panasonic 2SC2671 (watch out different pin arrangement), modern equivalent type, and the FM section now worked..

Gluing the pointer back to the wheel.

The biggest nightmare of all really was the tuning cord replacement, as I had no diagram to show how it was aligned, after many trialt and errors I found the correct route for the new cable and added a spring. I've added two photo's showing the chords route after fitting. Getting the red dial pointer re-glued was also very tricky, there is not enough room to fit it on the spindle when in the cabinet and the best way in the end was to glue it back from outside after refitting the front. I put Blu-Tac on the dial to support the lose end while gluing.
Later, probably the 1990's a smaller battery version was made, you can spot the difference at rear, front almost the same. Italy do many miniature collectible repro radios as well, I have about 7, they are like Dinky toy radios, lol
Update
About 4 weeks later the used mains transformer I fitted went open circuit primary. It may have been under rated, I think it was about 100 mA, so today I replaced it again with a larger one, around 1 amp rated and fitted it by the loudspeaker, as not much room on printed circuit board. This one is also a 'used' transformer and has a 15 v output instead of 12v, bulbs seem a little brighter but all working fine, finger crossed. New ones of a small size are quite hard to find these day and very expensive.