[Boatanchors] Need Info on Jackson 648R Tube Tester

[D C *Mac* Macdonald]

Well, Carl, the 648S was recommended but the

648R was what I found and bought on eBay and

it came with the powered ( but disconnected)

roll chart.  There is a small motor to run it,

probably DC, that will run it in either direction.

The drive belt is missing, which should not be

any sort of serious trouble, but the lack of the

wiring to actually power it is probably a bit more

of a problem.  It appears that the "power" roll

chart was an option only.  Pulling the chart

housing out of its cubby-hole is not a problem

as it is not bolted in.  HOWEVER, manually rolling

the driven wheel is cumbersome, to say the least.

 

I do have a manual with updated settings on the

way from Florida, so I guess it's not a serious

difficulty.  I'd just like to get the 648R fully back

to original working status.

 

I will apparently have to make an adaptor for

7-pin tubes such as 1625 and also for the 9-pin

TV sweep tubes such as 6JB6, 6GJ5, etc.

 

73 - Mac, K2GKK/5

Oklahoma City, OK

 


----  Previous message  ---- 

From: km1h at jeremy.mv.com
To: k2gkk at hotmail.com; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Need Info on Jackson 648R Tube Tester
Date: Mon, 9 Mar 2009 14:03:33 -0400
 
Powered roll chart? How lazy can you get Mac <g>

I've got the 648S along with all the obsolete settings on the PC if you 
need them. All 648 Jacksons share the same settings. Cant help with the 
motor circuit BUT the schematic is always stapled to the inside of the 
case. Hopefully it is still there.
 
Carl
KM1H
 
 
 
----- Original Message ----- 
From: "D C *Mac* Macdonald" k2gkk at hotmail.com
 To: boatanchors at mailman.qth.net
 Sent: Monday, March 09, 2009 11:47 AM
 Subject: [Boatanchors] Need Info on Jackson 648R Tube Tester
 
I recently purchased the subject tube tester. It has
a powered test data roll chart, but no wiring exists
between the 648R itself and the roll chart.

Does anybody have any info on this?


Thanks in advance.

Mac, K2GKK/5
Oklahoma City