In other news; I pretty soon will lay hands on a (hp) 200CDR ...
The 200CDR has been modified with a XLR connector in the front panel. While not original, it looks like it's been done with some skill, from the outside at least. I will report further as soon as I've laid hands on them. Reckon I need to do a recap at least partially. The 3552A has dead batteries, so will have to extract them. I expect to run from the mains exclusively.
Just restored a hp 200cd. All caps were within spec and had no relevant leakage and stayed where they were. One of the output tubes was week and was exchanged.
I've got three 200CDs now, the first one a later (G960 prefix) in full working order.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1357130)
The second was a death-trap (605-606xx, US made) bought from a house clearer type in Stoke, the green GND/earth wire had been wired to the live connection in the UK plug, this was spotted before I powered it up, if it had been wired correctly I reckon the transformer would had been fried, as it was set for 110V operation inside.
Amazingly this worked fine too, despite being a bit crusty. I've no idea what the extra button is for.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1357142)
The third was bought this year from Chelford another later one (G806 prefix), last owner had gone silent-key, they had ripped out all the big can capacitors (which were probably fine) and let it half finished with some old cans fitted but not wired up and the third non-polarized one missing. This is the crusty one I posted about before.
I thought I had some original can caps for this, but can't find them, it's been put to one side (round-tuit pile).
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1357160)
I wonder how many they made, as the US one from the mid 60's is s/n 606xx (plus at least 4000 made in Germany) and these were produced till the into the 1980's, last seen in the 1985 catalog.
David