UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Kenwood TS-520SE Transceiver overhaul notes Pt1

G8UWM-MildMartin · 11th Feb 2019, 1:29 am

I used the usual Servisol Super 10 for the contact spring, also to loosen and flush out the grease, then lithium-based grease for the rear ball bearing, front balls and epicyclic drive balls and shaft.
The 680-K (your R5,6&7, my R2,3,4) appeared to be carbon film, but the associated 100K was carbon composition. I de-soldered one end of R6 to measure them all: they were all just high of their 5% tolerance, but within 10%. Work had stock of suitable 0.75-W 1% resistors, not used on any current product, so I changed them while the board was loose and the desoldering machine was on. It made no noticeable difference to the meter reading on "HV" in TX, so I didn't mention it earlier.

11th Feb 2019, 1:29 am	#12
G8UWM-MildMartin Heptode Join Date: Jan 2004 Location: Stockport, Greater Manchester, UK. Posts: 827	Re: Kenwood TS-520SE Transceiver overhaul notes Pt1 I used the usual Servisol Super 10 for the contact spring, also to loosen and flush out the grease, then lithium-based grease for the rear ball bearing, front balls and epicyclic drive balls and shaft. The 680-K (your R5,6&7, my R2,3,4) appeared to be carbon film, but the associated 100K was carbon composition. I de-soldered one end of R6 to measure them all: they were all just high of their 5% tolerance, but within 10%. Work had stock of suitable 0.75-W 1% resistors, not used on any current product, so I changed them while the board was loose and the desoldering machine was on. It made no noticeable difference to the meter reading on "HV" in TX, so I didn't mention it earlier.