Measurements from my Dearmond Rhythm Chief 1100

[David King]

I know - I know! Woo Hoo! but I ain't telling . bTW the name means nothing to me cause I don't know hardly knobody anyways.

[StarryNight]

I didn't really think he was JL but I wanted to give a little nod to Victoria as he started it all here before he went big (as I'm sure belwar knows)

Story time: I called Mr. L once when I lived in Vancouver. I had one of his jumbos and an intonation problem so I called up the factory and Jean picks up the phone! I'm chatting with him and he tells me to come by the factory at 5:30pm so I make my way to North Van but when I arrive the place is empty. Then I turn a corner and see this little guy working on a belt sander all alone. He looks up at me and before long he's taking me on a tour of the factory, just me and him! I open up my guitar play a few tunes, explain the problem; an hour and a half later we shake hands and I'm on my way. That was 20 years ago. I doubt he's working the belt sander much these days.

[salvarsan]

Dearmond 1000 specs

Just a few small data points on a Dearmond Rhythm Chief 1000:

5.66 Henries,
17,010 ohms DC
27,910 ohms AC

Large magnets measured were 580-610 gauss on contact,
Small ones measured 300-500 gauss.

The wire had flattened, measures between .0020" and .0024" diameter
suggesting a #44 or #44.5 heavy build. Later, I'll get a resistance reading
on 10 feet and calculate the diameter.

These monkey-on-a-sticks were usually wound out to 6k or 8k, weren't they?

-drh

[David Schwab]

These monkey-on-a-sticks were usually wound out to 6k or 8k, weren't they?

I had one once and I took notes having taken the reading with an old Archer analog multi-meter kit. I wrote down 20K, and I know the meter wasn't very accurate, so 17K is probably about right.

[salvarsan]

I had one once and I took notes having taken the reading with an old Archer analog multi-meter kit. I wrote down 20K, and I know the meter wasn't very accurate, so 17K is probably about right.

* Belwar's had Rdc's around 15k.
I don't think the conductivity differences at 68F and 75F can account for that.

In any case, repairing the pickup means building a new bobbin
and putting an insane amount of #44 wire on it.



I can see why people refused to repair them.




-drh

[belwar]

Just a few small data points on a Dearmond Rhythm Chief 1000:

5.66 Henries,
17,010 ohms DC
27,910 ohms AC

Large magnets measured were 580-610 gauss on contact,
Small ones measured 300-500 gauss.

The wire had flattened, measures between .0020" and .0024" diameter
suggesting a #44 or #44.5 heavy build. Later, I'll get a resistance reading
on 10 feet and calculate the diameter.

These monkey-on-a-sticks were usually wound out to 6k or 8k, weren't they?

-drh

I'll measure my monkey (giggle) on a stick for tommorow. I've got one ofthe Guitar Microphones and the dearmond mandolin pickup to. message me if you dont see me post it as I get busy and forget :>

What frequency is your inductance and acr measured at?

bel

[salvarsan]

What frequency is your inductance and acr measured at?

1000Hz. I'm finding that the 120Hz test is less useful.

God help me, I'm thinking about doing Monkey-on-a-stick repairs.

The coils are okay if you clamp them before pulling the cover
but the cable core seems to fail at the pickup shell entrance.

This worked once: solder teflon wire to the core and pull it through
the shielded length. This retains the vintage shield and insulation
for vintage fetishists except that it no longer shorts out.


-drh

[RGP90]

Fhc guitar mic ohms

Hi, I'm new to this forum (after reading and enjoying the posts for the last few months). I'm currently searching the net to buy a Dearmond FHC for my '40 Harmony archtop. I'm seeing them wound from about 7.5k up to over 10k- is there anything anyone can tell me about the differences between these turn counts in power/ tone/ whatever? If I can get a tone something like in the clip posted below, I'd be happy. I'd rather sacrifice some power for clarity and openness if the high wind versions sound compressed, but I'd still like enough power to push the amp some (can always use an overdrive pedal...). Would appreciate any thoughts. Thanks

YouTube - Gibson L-30 W/DeArmond FHC-C Pickup