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Offline Mudflap
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« Reply #50 on: November 25, 2016, 08:37:16 pm »
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Digikey shows VT6, MPSA13 BC517 BC617 BSR50 all as obsolete Undecided

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« Reply #51 on: November 25, 2016, 09:51:24 pm »
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Tayda Electronics


    MPSA13 Darlington Transistor NPN
       
    MPSA13 Darlington Transistor NPN
        Add to Wishlist Add to Favorites
    Fairchild - Get It Fast - Same Day Shipping

    SKU: A-432   |   Qty Available: 97858
    $0.10

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    BC517 Transistor NPN 30V 0.5A TO-92 BC517-AT/P
       
    BC517 Transistor NPN 30V 0.5A TO-92 BC517-AT/P
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    KEC - Get It Fast - Same Day Shipping

    SKU: A-1332   |   Qty Available: 114366
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About  7 to 10 days.

 BC617(CBE) NTE Equivalent NTE48 T-NPN SI DARLINGTON

VT6 =  2SC4639/VT6

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« Reply #52 on: November 26, 2016, 07:52:34 am »
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you can use BF245, but set them in position inverted because they have another pins placement.


Posted on: November 26, 2016, 07:49:17 am
i did buy its at ebay

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Posted on: November 26, 2016, 07:50:44 am
coil specs


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« Last Edit: November 26, 2016, 08:07:10 am by NE555 »
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« Reply #53 on: November 26, 2016, 08:01:41 am »
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   Or you can just PM me your address and I will send you MPSA-13.   I have about 10 on hand.

I have a BUtt Load of MPS D04 NPN Darlington.   

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« Last Edit: November 26, 2016, 08:32:27 am by homefire »
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« Reply #54 on: November 26, 2016, 08:29:31 am »
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i will send TIP127 and some components... but thats dilemma every gram to parcel adds to the shipping price...
i have not LT1054, have NE5534 but its are in SO8 package that needed in adapter board (bought also at ebay).

Posted on: November 26, 2016, 08:10:38 am
NE5534 in SO8 package

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Posted on: November 26, 2016, 08:19:05 am
same adapters

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Posted on: November 26, 2016, 08:21:25 am
about a cable for coil from Sven Stau

Quote from: SVEN1;211263
Originally used Belden RG58A/U Coaxial Cable
20 AWG stranded (19x33) .035" tinned copper conductor, polyethylene insulation, tinned copper braid shield (95% coverage), non-contaminating PVC jacket. Overall Nominal Diameter: 0.195 in. , M17/155-00001
 But found it too stiff.

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 Then started using Marine Coax sold by West Marine, Anchor Brand.
 Really flexible

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The coax I use now is the same but, has a polyurethane jacket similar to what Eric Foster used.
 [ATTACH]34677[/ATTACH]

Hi Sven,

 The orange cable is a specially made RG58 coax. It is made for the offshore industry, specially for underwater use, with a polyurethane outer jacket rather than pvc. This is much stronger and hard to penetrate by contact with sharp edges. Water at pressure would  very quickly siphon along ordinary coax if there was even a small cut, and enter the coil windings. Salt water would write off both the coil and the cable and even enter the electronics unless a water blocking connector was used. Of course the orange coax is considerably more expensive, but I thought it was worth it as even for shallow water work it gives added protection.

 The cable I used is by JDR Cable Systems, part no. CAF9007.

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 I haven't bought any for some years and although I can find the company on the internet, I can't find the product. Maybe it has been discontinued. The 58cu by Ancor may be as good and it maybe worth while asking for a sample length. Both inner and outer conductors must be tin plated copper - the inner conductor stranded, not solid.

 Eric





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« Reply #55 on: November 26, 2016, 02:29:16 pm »
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Mudflap,

this is last schematic. i changed a date on it just you see its last.

regards





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« Reply #56 on: November 26, 2016, 02:50:50 pm »
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The Ancor 150510 RG58CU is tin plated on the center conductor and shield. Coverage is 96% not that that matters as the frequency is going to be low. looks like vinyl UV inhibited jacket. Amazon 100 feet for $65




OK Got the latest scheme.

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« Last Edit: November 26, 2016, 02:53:21 pm by Mudflap »
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« Reply #57 on: November 29, 2016, 04:41:01 am »
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you may use something from microphone coaxial cables with low impedance, better in fat isolation, or ordinary RG-58 with heat shrink tubing fitting above.

Posted on: November 26, 2016, 03:07:35 pm
a cable used in Deeper 10dd

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Posted on: November 26, 2016, 03:40:41 pm
subs to mpsa13

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« Last Edit: November 29, 2016, 04:41:52 am by NE555 »
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« Reply #58 on: November 29, 2016, 08:38:45 am »
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I have the MPSA-13 if he wants them.  I just need some place to send.   He has looked for those you listed and there all Obsolete.

They can still be had here : 

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« Reply #59 on: November 30, 2016, 04:29:38 am »
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Quote from: Carl-NC;224180
I use MPSA29. Higher voltage, higher current, same fT, same ß.


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