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 theold 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> wrote:Send Elec-trak mailing list submissions to
elec-trak cosmos phy tufts edu
To subscribe or unsubscribe via the World Wide Web, visit
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
or, via email, send a message with subject or body 'help' to
elec-trak-request cosmos phy tufts edu
You can reach the person managing the list at
elec-trak-owner cosmos phy tufts edu
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Elec-trak digest..."
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>
To: elec-trak cosmos phy tufts edu
Subject: (ET) E-15 card 1 help
Message-ID: <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"
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://cosmos.phy.tufts.edu/mhonarc/elec-trak/attachments/20210706/6125b946/attachment.htm>
------------------------------
Message: 2
Date: Wed, 7 Jul 2021 08:29:41 -0400
From: Chris Zach <cz alembic crystel com>
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) E-15 card 1 help
Message-ID: <7ec5b1b6-8102-b3a4-8144-169930a2cbfc alembic crystel com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
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
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://cosmos.phy.tufts.edu/mhonarc/elec-trak/attachments/20210707/8d9dc365/attachment.htm>
------------------------------
Message: 3
Date: Wed, 07 Jul 2021 07:09:08 -0600
From: Jim Coate <lists freerangeelectric com>
To: RICHARD WRIDE <ridevolfd cox net>
Cc: elec-trak cosmos phy tufts edu
Subject: Re: (ET) E-15 card 1 help
Message-ID: <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
Also edge connector terminals (someday I'll put a picture up!):
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>
To: 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
------------------------------
Subject: Digest Footer
_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
------------------------------
End of Elec-trak Digest, Vol 19, Issue 32
*****************************************
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak