|
Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
|
Thread Tools |
6th Sep 2022, 9:29 am | #1 |
Hexode
Join Date: Jan 2013
Location: Kelvedon, Essex, UK.
Posts: 273
|
Farnell FG1 Function Generator.
Diodes went s/c and burnt out the mains tx.
I have repaired the former and rewound with new wire. Now the difficult bit, how to clean off the pitch and varnish from the lams. I have tried petrol, parrafin, white spirit, acetone, and in the ultrasonic cleaner at 70 degees, but none will shift the crud. Has anyone successfully cleaned lams without damaging them? John. |
7th Sep 2022, 5:46 am | #2 |
Dekatron
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,670
|
Re: Farnell FG1 Function Generator.
I used a low heat oven, petrol and elbow grease to good effect in the past. Have also used Nitromorse, luckily had some old formula stuff.
Andy.
__________________
Curiosity hasn't killed this cat...so far. |
10th Sep 2022, 4:50 pm | #3 |
Hexode
Join Date: Jan 2013
Location: Kelvedon, Essex, UK.
Posts: 273
|
Re: Farnell FG1 Function Generator.
Thanks Andy.
The old memory needs a jog sometimes, I have a can of nitromorse in the cupboard. I soaked the lams in it for 24 hours, brushed them off in water with a tooth brush, soaked them in wd40 for a day, got all the lams back in except for a damaged one when I took them out. Stuck the mains on it, 22 volts spot on. John. |