Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Paramount => Topic started by: wullymc on November 01, 2014, 12:56:10 PM

Title: Paramount resistance query- go ahead to Voltage check?
Post by: wullymc on November 01, 2014, 12:56:10 PM

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)
         

Title: Re: Paramount resistance query- go ahead to Voltage check?
Post by: Paul Birkeland on November 01, 2014, 03:17:56 PM

Quote from: wullymc on November 01, 2014, 12:56:10 PM

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.

Quote from: wullymc on November 01, 2014, 12:56:10 PM

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

Title: Re: Paramount resistance query- go ahead to Voltage check?
Post by: wullymc on November 01, 2014, 03:25:14 PM

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

Title: Re: Paramount resistance query- go ahead to Voltage check?
Post by: wullymc on November 02, 2014, 01:35:21 PM

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

Title: Re: Paramount resistance query- go ahead to Voltage check?
Post by: Paul Joppa on November 02, 2014, 04:38:03 PM

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