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Re: (ET) Elec-trak Digest, Vol 19, Issue 32



The Curtis controllers are great. Easy to get. I switched because I couldn't get a slow enough speed for use of a tiller. The controller lets me creep at a snails pace for tilling. Mounted a little pot on the dash for speed control.




On 7/7/21 8:56 PM, Chris Zach via Elec-trak wrote:
Running an E20 I really do like the basic contactors: I've been using it for 20 years now and the only real problems are overheating on the accessory plug when using the AC rotary inverter with a 16 inch chainsaw. Need to build a higher-amp solution for the inverter.

Anyway, the E15 though is a bit more of a pain: Going to reverse improperly blows out that reversing relay; I think GE cheaped out on the E15 system by reversing the field and not the armature. Seems simpler, but really causes some serious voltage spikes in the field.

C

On 7/7/2021 9:12 PM, Dean Stuckmann via Elec-trak wrote:
I agree, I converted my E16 to an Alltrax years ago and also have a MEDI with the GE controller. So much better than the relay nightmare. Make the switch!

Take care,
Dean

On Jul 7, 2021, at 4:36 PM, Philip Hubbard <philiphbbrd gmail com> wrote:


After rewiring 8 tractors with Curtis 1204 PWMs, I wouldn't consider repairing the old wiring system. Once I experienced the stepless speeds and the increased battery life - no resistors up front - I will never go back.  And it is surprisingly easy to do! Phil Hubbard

On Wed, Jul 7, 2021 at 12:00 PM <elec-trak-request cosmos phy tufts edu <mailto:elec-trak-request cosmos phy tufts edu>> wrote:

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    Today's Topics:

       1.  E-15 card 1 help (RICHARD WRIDE)
       2. Re:  E-15 card 1 help (Chris Zach)
       3. Re:  E-15 card 1 help (Jim Coate)
       4. Re:  E-15 card 1 help (Larry Chace)


----------------------------------------------------------------------

    Message: 1
    Date: Tue, 6 Jul 2021 20:07:27 -0400 (EDT)
    From: RICHARD WRIDE <ridevolfd cox net <mailto:ridevolfd cox net>>
    To: elec-trak cosmos phy tufts edu
    <mailto:elec-trak cosmos phy tufts edu>
    Subject: (ET) E-15 card 1 help
    Message-ID: <781242772 330048 1625616447990 myemail cox net
<mailto:781242772 330048 1625616447990 myemail cox net>>
    Content-Type: text/plain; charset="utf-8"

    Getting started bringing an E-15 that's sat for probably 30 years.
    Need to replace capacitors, CRs & SCRs, plus a transistor (one
    legs broken off). does anyone have a parts list for card 1 that
    describes components so I can find replacements? Also a good
    wiring diagram, had some rodents chew some wires.

    VR

    Rich "EZ"
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    ------------------------------

    Message: 2
    Date: Wed, 7 Jul 2021 08:29:41 -0400
    From: Chris Zach <cz alembic crystel com
    <mailto:cz alembic crystel com>>
    To: elec-trak cosmos phy tufts edu
    <mailto:elec-trak cosmos phy tufts edu>
    Subject: Re: (ET) E-15 card 1 help
    Message-ID:
<7ec5b1b6-8102-b3a4-8144-169930a2cbfc alembic crystel com
<mailto:7ec5b1b6-8102-b3a4-8144-169930a2cbfc alembic crystel com>>
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    I believe all of that is in the Owner's manual. Download a copy
    from one
    of the Elec-Trak sites and get rolling. I do believe though that you
    should check the capacitors first: Most of them were simple delay
    caps
    and the electrolytics were made before the garbage quality capacitors
    from the 1980's hit the market. They just might be good (all caps
    on my
    E15 board are fine enough).

    Chris

    On 7/6/2021 8:07 PM, RICHARD WRIDE wrote:
    >
    > Getting started bringing an E-15 that's sat for probably 30 years.     > Need to replace capacitors, CRs & SCRs, plus a transistor (one legs
    > broken off). does anyone have a parts list for card 1 that
    describes
    > components so I can find replacements? Also a good wiring
    diagram, had
    > some rodents chew some wires.
    >
    > VR
    >
    > Rich "EZ"
    >
    >
    > _______________________________________________
    > Elec-trak mailing list
    > Elec-trak cosmos phy tufts edu
    <mailto:Elec-trak cosmos phy tufts edu>
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<https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak>
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    ------------------------------

    Message: 3
    Date: Wed, 07 Jul 2021 07:09:08 -0600
    From: Jim Coate <lists freerangeelectric com
    <mailto:lists freerangeelectric com>>
    To: RICHARD WRIDE <ridevolfd cox net <mailto:ridevolfd cox net>>
    Cc: elec-trak cosmos phy tufts edu
    <mailto:elec-trak cosmos phy tufts edu>
    Subject: Re: (ET) E-15 card 1 help
    Message-ID:
    <431fa5e3b96d99b4de890e633a0981ae freerangeelectric com
<mailto:431fa5e3b96d99b4de890e633a0981ae freerangeelectric com>>
    Content-Type: text/plain; charset=US-ASCII; format=flowed

    The Card 1 schematic is in the Homeowners Service Manual. I have
    SCR's
    and the various capacitors listed on my web store along with complete
    new cards. Since I build those I have every component involved and
    could
    get you whatever transistor, etc is needed.
http://freerangeelectric.com/index.php?main_page=advanced_search_result&keyword=card+1&search_in_description=1&categories_id=17&inc_subcat=1&manufacturers_id=&pfrom=&pto=&dfrom=&dto=&x=0&y=0
<http://freerangeelectric.com/index.php?main_page=advanced_search_result&keyword=card+1&search_in_description=1&categories_id=17&inc_subcat=1&manufacturers_id=&pfrom=&pto=&dfrom=&dto=&x=0&y=0>

    Also edge connector terminals (someday I'll put a picture up!):
http://freerangeelectric.com/index.php?main_page=product_info&products_id=285
<http://freerangeelectric.com/index.php?main_page=product_info&products_id=285>

    Note that I generally don't bother to repair old cards.... at a
    minimum
    all new capacitors as the old ones are getting dried out by now,
    diagnose and repair other bad components, and more often than not
    there
    is mechanical damage to the card along the edge connector and/or from
    previous repairs.


    On 07/06/2021 6:07 pm, RICHARD WRIDE wrote:
    > Getting started bringing an E-15 that's sat for probably 30 years.     > Need to replace capacitors, CRs & SCRs, plus a transistor (one legs     > broken off). does anyone have a parts list for card 1 that describes
    > components so I can find replacements? Also a good wiring
    diagram, had
    > some rodents chew some wires.
    >



    ------------------------------

    Message: 4
    Date: Wed, 7 Jul 2021 10:56:50 -0400
    From: Larry Chace <RLC1 etnainstruments com
    <mailto:RLC1 etnainstruments com>>
    To: elec-trak cosmos phy tufts edu
    <mailto:elec-trak cosmos phy tufts edu>
    Subject: Re: (ET) E-15 card 1 help
    Message-ID: <p05210601dd0b7008b2cf@[192.168.0.93]>
    Content-Type: text/plain; charset="us-ascii" ; format="flowed"

    Another potential difficulty is that at least some Card #1 were
    dipped in a vat of very durable varnish or other such coating, making
    it extra hard to de-solder parts that you want to replace.

    Jim's new cards are a good way to go, quicker and more reliable.

    (At one point Steve Shore asked me to test a batch of #1 cards and
    repair the bad ones if possible.  It was a lot of work; new cards
    would be much less effort!)

    Larry Chace, Ithaca, NY  I-5 and E15



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    ------------------------------

    End of Elec-trak Digest, Vol 19, Issue 32
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