Hammond 11224m Organ Nichicon capacitors - Page 1
Forum section: electronics / repair

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 03:33:05 pm
content: I kind of don't understand how these capacitors work and I need to get them replaced. Called up Nichicon here in the states and they we're less then helpful other than to say they were custom manufactured for Hammond and to contact Hammond. Well Hammond went out of business and parts of it was sold ect..These are Nichicon 4000uf 50 wV 51 week of 1976. I need to get all 4 replaced since there is a 60Hz hum in the speakers. While I am at it I am replacing a lot more of the ITW and other Nichicon's and this Organ has so many capacitors it isn't even funny.however I have no clue how these things work since they have like multiple connections.

author: helius
author_rank: Super Contributor
timestamp: April 26, 2016, 03:50:46 pm
content: Do you have a service manual for the unit? The connections are usually described in sufficient detail to discern the arrangement.The capacitor is either a single electrolytic with multiple redundant terminals (used for greater ruggedness and current capability), or a multiple package with a number of electrolytics inside the same sleeve. The latternormallyare marked with the capacitance and voltage of each of their parts. They can be replaced with individual separate capacitors since the coupling isn't that close

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 04:07:03 pm
content: Quote from: helius on April 26, 2016, 03:50:46 pmSure don't wish I did make life easier. searched and searched the net for it. Called up Hammond and they said to get a hold of another company in Illinois. They're wanting like 100.00 for the service manual.I may take one apart and have a look inside, but rather not spend an extra $100 if I can avoid it.

author: wraper
author_rank: Unknown
timestamp: April 26, 2016, 04:21:40 pm
content: Take one out. For me it seems that all outer terminals are connected together (-) and to the shell. Center terminal should be +.

author: SeanB
author_rank: Super Contributor
timestamp: April 26, 2016, 04:43:49 pm
content: Only replace the 4000uF ones, which should get most of the hum out. Replace with 4700uF 63V ones, and most of the hum will be gone. The rest is likely still usable in the first place.

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 04:57:57 pm
content: I took one apart, yep the outside terminals are the case and the inner is the other side.The most confusing part is the inner has a Minus sign next to the interior plug so confusing.I think the inside is cathode since it's on the ground rail and the case is the anode.

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 05:02:20 pm
content: Quote from: SeanB on April 26, 2016, 04:43:49 pmCan that be done? I thought only the voltage can be greater rather than the capacitance.

author: wraper
author_rank: Unknown
timestamp: April 26, 2016, 05:05:19 pm
content: Quote from: marty on April 26, 2016, 04:57:57 pmPlease measure the actual voltage. Old electronics may have common positive. Also this circuit may have dual supply too (+V, GND, -V).

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 05:32:40 pm
content: Quote from: wraper on April 26, 2016, 04:21:40 pmi have an idea to figure it out.. Time to make one go boom. non vented 4000uf cap.. it's going to make a huge mess but F it.

author: Anks
author_rank: Frequent Contributor
timestamp: April 26, 2016, 05:41:13 pm
content: Measure the voltages before taking them out I would suspect these are the +- rails for the main amplifier

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 05:49:22 pm
content: Would the Capacitor EAR be the middle pin since the cap itself is labeled EAR NEGATIVE

author: SeanB
author_rank: Super Contributor
timestamp: April 26, 2016, 06:05:29 pm
content: Yes, but be aware that the other might be marked Ear Positive, so do not get the wires mixed up, otherwise you will have a lot of confetti suddenly loudly appear.

author: marty
author_rank: Contributor
timestamp: April 26, 2016, 06:16:40 pm
content: Quote from: SeanB on April 26, 2016, 06:05:29 pmI have been searching the net for Capacitor EAR but not finding anything. any idea where I might learn about it?

author: SeanB
author_rank: Super Contributor
timestamp: April 27, 2016, 12:54:14 pm
content: You will not get them as the terminology these days is Capacitor, can mount, terminal lug positive or negative. Those capacitors are basically obsolete, the replacement will be one of 3 types, a radial lead capacitor with leads coming out the one end rubber bung, or an axial one with a single lead ( always the positive) coming out the bung on one side with the other lead attached to the case, or finally a radial capacitor with a clip to mount it and screw lugs or terminals on the rubber at one end and marked on the side which lead is positive according to the black mark on the one rivet or the shape of the crimp of the lead or the plus on the one section of rubber.

author: helius
author_rank: Super Contributor
timestamp: April 27, 2016, 02:58:11 pm
content: Snap-in style capacitors are still manufactured, including styles with more than 2 lugs. (Search in Mouser or Digikey Passives>Capacitors>Aluminum>Snap-in). But the particular arrangement you have may be custom or obsolete.

author: marty
author_rank: Contributor
timestamp: April 28, 2016, 03:29:09 pm
content: I've ordered everything already..Thanks for all the input.I could have probably answered my own question by just taking the damn capacitor apart to begin with.