IC7000 no HF Transmit
Nice work Tommy!
It’s so gratifying to fix this stuff even after all these years.
My wife still asks why I don’t send the radio off for repair, I do know a guy close by that services these. I
By
W1JCW
·
#42957
·
|
Re: IC7000 no HF Transmit
GREAT NEWS!!! I found the problem and resolved it.
The problem was an open circuit on one side of L305 output transformer.
The open circuit was caused by a manufacturing flaw (quality control).
I
By
Tommy Wooten
·
#42956
·
|
Re: Fixing the unrepairable IC7000
So the change in components and not the schematics is very common. I had
two Icom 706 MkII G's, one a low serial number and one a later version, the
early one used Motorola finals on the PA board.
By
Pat Goodyear
·
#42955
·
|
Re: Fixing the unrepairable IC7000
Craig, From what you observed, it does sound like they were replaced. I've
run across this with stereo gear. It's usually recommended by
experienced techs to replace with what was there if it was
By
Bob
·
#42954
·
|
Re: Fixing the unrepairable IC7000
Fair point Bob about the making a change from the manufacturer. The 2 capacitors i mentioned were a different brand than the others of the same rating and the solder joints didn’t look the same as
By
Craig- KB4RU
·
#42953
·
|
Re: Fixing the unrepairable IC7000
Every once in a while if you find a part that doesn't match the schematic,
such as you found a 47uF where you expected a 100uF, doesn't always
mean someone installed the wrong part. Sometimes the
By
Bob
·
#42952
·
|
Re: Fixing the unrepairable IC7000
Your story reinforces what is a very typical scenario during repairs of most anything.? Yes, sometimes thing fail in spectacular ways (lightning strike, water damage) that make a repair attempt
By
Mark Brueggemann K5LXP
·
#42951
·
|
Fixing the unrepairable IC7000
This email thread has great timing. Have 3 of these awesome rigs and a previous one lost the cap. Sent it to a friend hamrepair.com in SA Texas.
Just have that failure again, now I'm inspired to fix
By
W1JCW
·
#42950
·
|
Re: IC-7000 / Clipperton-L Linear
The 7000 manual says for an amp relay not to exceed 16 volts @ 200mA. I did
work on a Clipperton a few years ago.
I don't remember the current draw but I do remember it was more than 16
volts so you
By
Bob
·
#42949
·
|
Re: IC-7000 / Clipperton-L Linear
Thanks.
Ed KE6SU
yahoo.com@groups.io> wrote:
By
Edward Luers
·
#42948
·
|
Re: IC-7000 / Clipperton-L Linear
The IC-7000 has very small relays that do the switching and they are hard to change. I used the MFJ ARB 704 interface box with an Heathkit SB-200.
By
J.D. Barron
·
#42947
·
|
Re: IC-7000 / Clipperton-L Linear
Ed,
I don’t have specific information, but an area of concern is the IC7000 circuit that switches the amp from stand-by to operate. The voltage/current requirements of the amp might exceed the
By
R Elms
·
#42946
·
|
IC-7000 / Clipperton-L Linear
Anything special about connecting a IC-7000 to a Clipperton-L Linear?
By
Edward Luers
·
#42945
·
|
DSP unit spare part
Hi, I'm looking for the ic-7000 DSP unit spare part
Thanks and 73, Stefano
By
Stefano Donati, IV3IPS - II3O
·
#42944
·
|
Re: Fixing the unrepairable IC7000
Craig,? ?I've been doing surface mount and through hole repairs for years (40 +).
you? can glue the trace back down with superglue but use an accelerent, epoxy will work, but you have to wait for
By
pat goodyear
·
#42943
·
|
Re: Fixing the unrepairable IC7000
Hi,
When the two 12v tants are nearly all SC after 20 years, if one holds the power on button in for too long this takes the 4R7 resistor on the underside of the logic power supply board. The
By
Andrew Lenton
·
#42942
·
|
Re: Fixing the unrepairable IC7000
This is very insightful and inspiring, Craig.
Thank you for sharing your experiences.
ismail
gmail.com@groups.io> wrote:
By
(( KT6LN ))
·
#42941
·
|
Fixing the unrepairable IC7000
Hey everyone,
I am new to this group and I am in the process of repairing a few IC-7000s.? One was given to me by my grandfather and the other was my dad's that failed and was deemed irreparable due
By
Craig- KB4RU
·
#42940
·
|
Re: IC7000 no HF Transmit
gmail.com@groups.io> wrote:
By
Tommy Wooten
·
#42939
·
|
Re: IC7000 no HF Transmit
I appreciate all the instructions and advice from Andrew, JD and James.
It has been a few days since I last did any testing. So far, I have found
nothing that is causing the output power to be so
By
Tommy Wooten
·
#42938
·
|