The Murphy Builders Site

Just a word to the wise. I bought a Sigtronics SPA 400 intercom from ACS at Oshkosh, thinking an intercom was an intercom. Since the first flight, I have been plagued with low audio volume and garbled transmit audio to the point of being unreadable. I took a look at the wiring of the thing and found that most of the supplied harness used no shielded wiring in the mic circuits. I replaced it with an NAT unit, and all these problems have disappeared. What a piece of garbage! If anybody wants the SPA 400, it's going cheap, but I'd only recommend it for a glider!

Al




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That's what's in my customers Pegastol. Works great. I replaced it two years
ago because his old one died, and did model to model swap so it was nothing
but a quick connect off/on. After taking the old one apart I found the only
reason it quit working was his nose fuel tank had leaked into it and
corroded a board spot to ground. Cleaning that up he now has a spare. Maybe
you got a lemon Al....or the prewire harness had one wire out of place? or a
trim pot was needing tweaking?

----- Original Message -----
From: "Alan Hepburn" <ahepburn@renc.igs.net>
To: "rebel builder" <rebel-builders@dcsol.com>
Sent: Monday, October 31, 2005 9:22 PM
Subject: Bad Product

Just a word to the wise. I bought a Sigtronics SPA 400 intercom from ACS

at Oshkosh, thinking an intercom was an intercom. Since the first flight, I
have been plagued with low audio volume and garbled transmit audio to the
point of being unreadable. I took a look at the wiring of the thing and
found that most of the supplied harness used no shielded wiring in the mic
circuits. I replaced it with an NAT unit, and all these problems have
disappeared. What a piece of garbage! If anybody wants the SPA 400, it's
going cheap, but I'd only recommend it for a glider!

Al




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Al, I'm interested.

Dave
Colville, WA

At 18:22 31-10-05, you wrote:

Just a word to the wise. I bought a Sigtronics SPA 400 intercom
from ACS at Oshkosh, thinking an intercom was an intercom. Since
the first flight, I have been plagued with low audio volume and
garbled transmit audio to the point of being unreadable. I took a
look at the wiring of the thing and found that most of the supplied
harness used no shielded wiring in the mic circuits. I replaced it
with an NAT unit, and all these problems have disappeared. What a
piece of garbage! If anybody wants the SPA 400, it's going cheap,
but I'd only recommend it for a glider!

Al




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Hi Dave,

I live in Spokane (9 Mile Falls, really). Contact me off line
bgeorgen@peoplepc.com I fly a Rebel amphib out of Tum Tum on the Spokane
River.

Bruce


----- Original Message -----
From: "Dave Klimas" <dklimas@plixtel.com>
To: <rebel-builders@dcsol.com>
Sent: Monday, October 31, 2005 8:22 PM
Subject: Re: Bad Product

Al, I'm interested.

Dave
Colville, WA

At 18:22 31-10-05, you wrote:

Just a word to the wise. I bought a Sigtronics SPA 400 intercom
from ACS at Oshkosh, thinking an intercom was an intercom. Since
the first flight, I have been plagued with low audio volume and
garbled transmit audio to the point of being unreadable. I took a
look at the wiring of the thing and found that most of the supplied
harness used no shielded wiring in the mic circuits. I replaced it
with an NAT unit, and all these problems have disappeared. What a
piece of garbage! If anybody wants the SPA 400, it's going cheap,
but I'd only recommend it for a glider!

Al




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