early model 1C's

littlewoodboats

Malbec wrote: »

The top photo is showing the polyswitch which is used for tweeter protection. The other photo shows a jumper in place of the polyswitch.

I should have known this as I put in new switches when I did my 2A's

PolkieMan wrote: »

Yes I used the poly switch and he used a jumper, you can use a resistor see the url below just mouse over the area.

Where did you source the poly switch and did you by chance check it resistance?

JayCee would you mind giving the short form of the inductor swaps and what you were looking for in the ones that were not quite correct? I talked to Arizona this afternoon and should be able to deal with whatever is needed.

JayCee

littlewoodboats wrote: »

JayCee would you mind giving the short form of the inductor swaps and what you were looking for in the ones that were not quite correct? I talked to Arizona this afternoon and should be able to deal with whatever is needed.

Here's what Tony (Gimpod) sent me when I placed my Jantzen order:

...your not going to want to use the 20 gauge inductors as the DCR is just to low.

A word on Jantzen Part numbers, you only want to use the ones that start with a 1 as this denotes an air-core inductor.

According to the Jantzen wire coil list (Dated 04-06-2008) the closest one's I could find for the 1C's are as follows:

Stock 22ga, 0.13mH, 0.370 ohms
Jantzen #1129, 22ga, 0.15mH, 0.330 ohms, This would have to be unwound to 0.130mH but could be a problem as the DCR is already lower than stock and would be even lower after unwinding and my be out of the +/- 10% margin.

Stock 22ga, 0.400mh, 0.687 ohms
Jantzen #1489, 22ga, 0.400mh, 0.640 ohms, This should be fine as the DCR is within +/-10%

Stock 22ga, 1.250mH, 1.329 ohms
Jantzen #1461, 22ga, 1.400mH, 1.310 ohms, This would have to be unwound to 1.250mH but could be a problem as the DCR is already lower than stock and would be even lower after unwinding and my be out of the +/- 10% margin.

Stock 22ga, 2.500mh, 1.953 ohms
Jantzen #1119, 22ga, 2.500mh, 1.840 ohms, This should be fine as the DCR is within +/-10%

One more thing unwinding inductors is not for the faint of heart as it can be a bit of trial and error trying to get a balance between the mH's and DCR that will work and you could end up going through several inductors in the process. You would also need an LCR meter to measure the inductance as you unwind.

Now you know why I titled that thread "Inductor DCR Insanity For SDA's"

His reference to the 20 gauge inductors is because I'd ordered the 1.25mH and 2.50mH in 20 gauge and was unable to cancel them. There doesn't appear to be a really close match for either of these. I hope to do more research for a suitable sub that is either a drop in replacement or can be unwound. The 22 guage 0.400mH's were the only ones within spec and I used on the 1C's (pictured in my previous post).

To finish my 1.2tl's, I have two .75mH Jantzen inductors that need to be unwound to .7mH. This, the 1.25mH plus 2.5mH 1C inductors and/or future replacements that might work for the 1C's, is what I was referring to when you and I discussed Arizona. All my other 1.2 inductors have been replaced with Solen/Jantzen per DarqueKnight's threads.

Hope this is what you're asking for?

PolkieMan

The Poly switch came from Parts express.It is a RXE135
http://www.parts-express.com/cat/polyswitch-resettable-fuses/1433

JayCee

JayCee wrote: »

Stock 22ga, 2.500mh, 1.953 ohms
Jantzen #1119, 22ga, 2.500mh, 1.840 ohms, This should be fine as the DCR is within +/-10%

His reference to the 20 gauge inductors is because I'd ordered the 1.25mH and 2.50mH in 20 gauge and was unable to cancel them. There doesn't appear to be a really close match for either of these.

Can't correct my previous post. Above quote...incorrect info is in red. The 2.500mH does have a compatible match based on Tony's research. I'm going to order it in a few months.