UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 9R-59D Coil Pack

Station X · 13th Feb 2020, 10:56 pm

I believe there is a problem with the sealing compound used on the coils which causes them to lose 'Q' as it ages.

There are many 9R59D* threads on here. Have a look at them and you'll find a mention of this.

Attempts to measure the absolute sensitivity of my own receiver were not successful, as the test conditions aren't clearly defined.

13th Feb 2020, 10:56 pm	#14
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: 9R-59D Coil Pack I believe there is a problem with the sealing compound used on the coils which causes them to lose 'Q' as it ages. There are many 9R59D* threads on here. Have a look at them and you'll find a mention of this. Attempts to measure the absolute sensitivity of my own receiver were not successful, as the test conditions aren't clearly defined. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.