[Heathkit] SB-610 & SB-620

[peter A Markavage]

Make sure you check all the resistors hanging off the focus and intensity
pots. My CRT's in my HO-10 and HO-13 are roughly 44 years old and still
provide a good trace. My SB-610 and 620 are 30+ years old and still
provide a good trace and intensity. However, most times when the trace
started to get dim, it had to do with the resistors mentioned above
changing value over time. Those CRT's pop up at flea markets frequently,
and probably Fair Radio still has some.

Pete, wa2cwa

On Tue, 28 Sep 2004 21:22:20 -0400 (Eastern Daylight Time) "carl"
<l_carlj at bellsouth.net> writes:
> Good Evening,

> 

> In the process of redoing both my SB-610 Monitor Scope & the SB-620
> Scanalyzer.

> Both tubes are "really" dim & traces aren't that good.

> Voltages are good on each.. so don't think thats the problems.

> Tubes have been replaced.

> Believe both are getting "vintage .. like us all" & tubes will need 
> a
> transplant.

> Are there any sources or does any members have the tubes ?

> They are the 3RP1 for the SB-610, & the 3RP7 for the SB-620.

> Thanks guys & 73s

> Carl k4zrd

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