need help with the ella

Posted by mikey115 (A) on November 28, 2002 at 09:31:10

hi i was pointed in this direction by zarniwoop who has been very kind in helping out with my problem. before i go further i must caution you that i am a total idiot in electronics - the only reason i took on the ella was to challenge myself, wean myself off 'hi end' kit and equally 'hi end' dealers and learn about this craft and boy do i have a lot to learn :)

so here goes. i completed the kit and was getting weird figures ont he meter which didnt tally with the numbers in the manual. checked wiring and found that chassis ground was not secure and vol pot ground had a bad joint - fixed this and was getting the right numbers save for the last 2 stages.

i rechecked the wiring and as it was suggested that there might be a cold solder joint with the 10ohm/4 watt resistors to ground, i checked this and yes there was and fixed it. the latest readings i got are:

A5 - D5 - 50vdc
A2-A7/B2-B7: 6.19 vac (it was 6.27 last night)
C2-C7/D2-D7: 6.22 vac
pins 7 n 8 on main pcb: 6.22 vac (6.26 last night)
B+: 425 vdc (390 vdc last night)

this is the strange part:
when i put in the 6550s and checked the bias rca, instead of getting .4vdc i was getting 250 mvdc. i stopped here and did not carry on with the other tubes.

question: is the power ground and signal ground connected in this amp? i remember being told that it shouldnt - but i may have heard wrong.

is the centre pin of the bias rca connected to ground?

finally what gives? would appreciate any help

thanks for reading
mikey

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Topic - need help with the ella - mikey115 09:31:10 11/28/02 (24)

Re: need help with the ella - G 11:27:32 11/28/02 (4)

Re: need help with the ella - zarniwoop 16:42:13 11/28/02 (3)

Re: need help with the ella - G 17:02:52 11/28/02 (2)

Re: need help with the ella - zarniwoop 17:38:00 11/28/02 (1)

Re: need help with the ella - G 17:48:41 11/28/02 (0)

Re: need help with the ella - zarniwoop 10:38:22 11/28/02 (17)

need help with the ella - mikey115 02:28:36 11/29/02 (16)

Re: need help with the ella - zarniwoop 08:58:59 11/29/02 (15)

Re: need help with the ella - mikey115 09:32:25 11/29/02 (14)

Re: need help with the ella - zarniwoop 10:34:00 11/29/02 (13)

Re: need help with the ella - Alberto 00:32:25 12/10/02 (6)

Re: need help with the ella - mikey115 15:38:30 12/11/02 (5)

Re: need help with the ella - Alberto 02:35:32 12/18/02 (3)

Re: need help with the ella - mikey115 07:37:49 12/19/02 (2)

Re: need help with the ella - Alberto 03:45:34 12/20/02 (1)

Re: need help with the ella - mikey115 23:54:18 12/22/02 (0)

sorry alberto, i got your name wrong (nt) - mikey115 19:23:10 12/11/02 (0)

Re: need help with the ella - mikey115 11:00:34 11/29/02 (5)

Re: need help with the ella - zarniwoop 12:28:43 11/29/02 (4)

Re: need help with the ella - mikey115 08:49:17 11/30/02 (3)

IT WORKS!! - mikey115 05:03:11 12/01/02 (2)

congrats! - zarniwoop 09:06:59 12/01/02 (1)

Re: congrats! - mikey115 22:25:45 12/01/02 (0)

Re: need help with the ella - miikey115 09:33:40 11/28/02 (0)

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