[Dept. of Computer Science]

Ducretet-Thomson D225

During my previous visit to Rennes (France) I had to choose between the B.F.R. and this set of about the same era, simply because there are limits to what one can carry over 1000km by train and bicycle. This time I went to the same shop to find out it was still there after three months; which was a good starting point for negociating and I could buy this radio for a reasonnable price.

I sold the radio again in July 1998.

Data for this radio
Type Ducretet-Thomson D225.
In France the radio is simply known as a Ducretet
Bands GO (LW, 1020-2000m), PO (MW, 200-570m),
OC (SW, 17-52m).
Cabinet Wood; WHD = 55 x 30 x 23 cm.
Tubes 6E8G (osc./mixer, ECH35), 6M7G (IF stage, EF39),
6H8G (detector and AF stage, EBF32), 6V6G (output tube),
5Y3GB (rectifier), 6AF7 (tuning eye, EM34), dial lights.
Controls Tone, Volume/off, Tuning, Bandswitch.
Produced France, 1940.

Restoration

The radio's cosmetic condition was far better than the BFR's; the veneer is slightly damaged at some places, and the finishing is worn out around the knobs. The left `cheek' (visible on the photo) misses almost all of the finish, I think due to exposure to sunlight. I don't think I can apply any finish better that what the set has now, so I left the woodwork as is. The set has a back, but this was damaged a bit during transportaton.

I substituted a 6K8 for the missing 6E8G and replaced a few capacitors to bring the set to life; the radio has excellent selectivity and good audio. Unfortunately it suffered from spurious oscillations. Thinking this might be due to the replacemant of a hexode/triode mixer by a pentagrid type, I assembled a `fresh' ECH35 by soldering an ECH81 in an octal base. The radio plays fine with this somewhat peculiar assembly.

The main disaster is the dial face: it was mounted inside out (with the lettering on the outside!) after a previous `fix', and almost all lettering had disappeared. I made a replacement and glued this to the glass dial face; this fake dial does the job but is not a perfect solution because the lettering does not stand out sufficiently against the dark background. Does anybody have an original Ducretet D225 dial face?

Gerard Tel, gerard@cs.uu.nl