11-02-2012, 10:00 AM
Hi,
Many thanks Coherers for your kind comments. I find cabinetwork to be the most satisfying part of my restorations; I've completely stripped and rebuilt chassis before but however good a job I make of them they end up hidden from view once installed into the cabinet. Well spotted; the loudspeaker cone was just covered in a layer of dark dust which easily brushed off hence it does look much lighter in colour.
Thanks Joe and you've got a job that I truly detest; removing pitch from transformers is a messy job. Baking in an oven will do the job and the way I've done it previously is to use an old baking tin or tray and lift the transformer from the tray with a bit of packing to allow the pitch to drop free into the tray. Heat and duration are down to experiment but try 160 degrees as a start and keep checking progress. I've also used a blow lamp which is a bit fierce but also gets the job done. In short I don't like transformers covered in pitch.
I'll have a look at what notes and pictures I have Joe and with luck I'll add a few notes on coil winding as you suggest in a new thread. Generally transformer winding is quite pleasant to do once the transformer is stripped and the bobbin freed. Once the basic principle is grasped then it is quite easy to design your own transformers to give any output voltage either step up or step down. Ed Dinning is light years ahead of me when it comes down to transformer technicalities but I don't mind adding my notes from a novices point of view; I know enough basics to to give me a working transformer and this to me is what counts.
Kind regards, Col.
Many thanks Coherers for your kind comments. I find cabinetwork to be the most satisfying part of my restorations; I've completely stripped and rebuilt chassis before but however good a job I make of them they end up hidden from view once installed into the cabinet. Well spotted; the loudspeaker cone was just covered in a layer of dark dust which easily brushed off hence it does look much lighter in colour.
Thanks Joe and you've got a job that I truly detest; removing pitch from transformers is a messy job. Baking in an oven will do the job and the way I've done it previously is to use an old baking tin or tray and lift the transformer from the tray with a bit of packing to allow the pitch to drop free into the tray. Heat and duration are down to experiment but try 160 degrees as a start and keep checking progress. I've also used a blow lamp which is a bit fierce but also gets the job done. In short I don't like transformers covered in pitch.
I'll have a look at what notes and pictures I have Joe and with luck I'll add a few notes on coil winding as you suggest in a new thread. Generally transformer winding is quite pleasant to do once the transformer is stripped and the bobbin freed. Once the basic principle is grasped then it is quite easy to design your own transformers to give any output voltage either step up or step down. Ed Dinning is light years ahead of me when it comes down to transformer technicalities but I don't mind adding my notes from a novices point of view; I know enough basics to to give me a working transformer and this to me is what counts.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
