Paramount resistance query- go ahead to Voltage check?

[wullymc]

Hi there,

Just finished up my Paramounts and have performed the resistant checks. 

I have a few concerns, namely Terminal 9, 19, B1, B4, & B6. 

I have listed all the resistance checks.  Can you please offer any pointers or should I proceed to voltage checks.  Thanks!.....Dave

Terminal    Manual      L Block      R Block

1              *              increasing    increasing
5              1K                  999          996
6            1118            1115          1112
7            249K            247K        247K
9            124K*              0            1 (infinity)
10            0                    0            0.07

11            3.0M              1 (infin)    1 (infinity)
12            5.6M              1 (infin)    1 (infinity)
13            0                    0            0
14            9.2M              1 (infin)    1 (infinity)
15            15M                1 (infin)    1 (infinity)
16            *                    increasing    increasing
17            0                    0            0
18            0                    0            0
19            128K              0            1 (infinity)
20            249K              246K          247K

A1          1027              1031          1028
A2          *                    1(infin)      increasing
A3          249K              247K          247K
A4          1028              1021          1019

B1            0                    1.2          0
B2            8.2K              10.22k      9K
B3            249K              247K        247K
B4            130K              296K        296K
B5            0                    0            0
B6            177K              296K        1 (infinity)
B7            220                236          230
B8            *                    1 (infin)    1 (infin)
B9            *                    1 (infin)    1 (infin)
         

 

[Paul Birkeland]

I have a few concerns, namely Terminal 9, 19, B1, B4, & B6. 
Terminal    Manual      L Block      R Block
9            124K*              0            1 (infinity)
19            128K              0            1 (infinity)

I will assume that these are 300B amps.  9 and 19 are wired together.  On 9, you should just have the red wire of the red/black twisted pair, and the 0.1uF cap.  19 is the plate of the driver stage, and should be connected to B4, then up to "OB" on the driver PC board.  Just double check these connections, and be sure that there isn't some kind of short between 9 or 19 and some other terminal.  I wouldn't do voltage checks until that is correct.

B6            177K              296K        1 (infinity)

These continued differences between amps would seem to suggest that there is a miswire in at least one of them. 

-PB

 

[wullymc]

Hi Paul,

Thanks very much.  Sorry, you are right it is wired for 300B.  I went back and took a look while you were posting.  I resoldered the 19L connection and the B6 for the Right monoblock (the red wire from the pcb solder job wasn't quite there)!

Now everything seems to be tied together my reading now are same on both monoblocks:

Terminal 9      296K      Manual    128K *
            19    296K                      128K *
            B1      0                              0
            B4    296K                      130K  *
            B6    296K                      177K  *



Because of the * would my values be ok because they are higher than the 128k, 130k, 177k ?   

Also, I rechecked that 9, 19 B4 and OB are all connected.  Thanks so much!....Dave

 

[wullymc]

Does this look ok?:

Terminal 9      296K      Manual    128K *
            19    296K                      128K *
            B1      0                              0
            B4    296K                      130K  *
            B6    296K                      177K  *



Because of the * would my values be ok because they are higher than the 128k, 130k, 177k ?   

Thanks...Dave

 

[Paul Joppa]

Yes, those look good. You can measure with the leads reversed to see if it changes - it will on some meters I think.