[ICOM] 7610 relay

[Larry Hinton]

Adam,

Can you shed some more light on the relay issue? 

I just bought a new 7610 a few months ago. Still have yet to get on the air. I ordered a Hy-Gain AV-680 back in May and it arrived earlier this month. Now to get the antenna up and the rest functional. I have not had a HF station since 1974. I am looking forward to it.

Larry Hinton
K7YBZ
Sent from my iPad

> On Sep 28, 2021, at 13:15, Adam Farson <afarson at telus.net> wrote:
> 
> Hi Ed,
> 
> Thanks - all understood. I am surprised that the MOSFET keying function
> was unusable after the RL4001 contacts welded, as the two devices are
> controlled by separate lines from the data multiplexer.
> 
> Armed with the service manual, you should be able to replace the relay
> without much trouble. The board layout for the RF Unit clearly shows the
> location of RL4001.
> 
> I have never had this situation, because I have been using solid-state
> amplifiers for 33 years - first an IC-2KL, then a Yaesu Quadra which I
> still own. The IC-2KL was keyed from the ACC2 socket, and I key the Quadra
> from the SEND jack in the MOSFET setting to de-activate RL4001. After a
> near-fatal HV accident at CERN in 1968, I vowed that my future amateur
> station(s) would be 100% solid-state.
> 
> 73, Adam VA7OJ/AB4OJ
> 
> 
> 
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
> On Behalf Of Ed K1EP
> Sent: 28 September 2021 13:00
> To: ICOM Reflector <icom at mailman.qth.net>
> Subject: Re: [ICOM] 7610 relay
> 
> Hi Adam-
> Thanks for the reply. I am familiar with the Icom way of implementing the
> SEND function, as I have dealt with it as far back as the first 756.  I
> normally run low power, so the SEND issue usually doesn't affect me. If I
> know that I will be using an amp, I will use a buffer. I have built many
> for my use and for others. The situation was that I was in the Bahamas a
> couple of years ago with the 7610 and it was supposed to be a LP operation
> for the 7610. After a series of events, we ended up using an old tube amp
> and I hadn't brought a buffer. The reed relay fused closed, which rendered
> the FET useless.  I built an opto isolated relay out of junk box parts to
> "save the day" and used the ACC pins. The problem now is that I want to
> sell the radio and a prospective buyer won't accept the ACC solution,  no
> matter how much I explain it. I would be satisfied with cutting it out if
> it were easier! Thanks for the details.
> 
> reply to: K1EP at arrl.net
> 
>> On Tue, Sep 28, 2021, 15:44 Adam Farson <afarson at telus.net> wrote:
>> 
>> Hi Ed,
>> 
>> The SEND relay is RL4001, a reed relay mounted on the bottom corner of
>> the RF Unit board. To access the RF Unit, the Digi-Sel Units and a
>> shield plate must be removed. You will need to remove the RF Unit to
>> replace the relay.
>> 
>> The IC-7610 has two menu-selectable amplifier keying options on the
>> SEND RCA jack; RELAY (rated at 16V/500mA non-inductive) and MOSFET
>> (rated at 250V 200mA non-inductive). Refer to IC-7610 user manual, p.
>> 2-3. If the amplifier keying line exceeds these limits, an auxiliary
>> keying buffer is required.
>> 
>> You will need the service manual to perform this repair. If your 7610
>> is still under warranty, an authorised Icom service centre will take
>> care of it.
>> 
>> 
>> 73, Adam VA7OJ/AB4OJ
>> 
>> 
>> 
>> -----Original Message-----
>> From: icom-bounces at mailman.qth.net
>> [mailto:icom-bounces at mailman.qth.net]
>> On Behalf Of Ed K1EP
>> Sent: 26 September 2021 04:48
>> To: icom at mailman.qth.net
>> Subject: [ICOM] 7610 relay
>> 
>> Has anyone replaced or repaired the internal amp keying relay in a 7610?
>> Is it easily accessible or do you have to remove boards because it is
>> buried somewhere?
>> 
>> reply to: K1EP at arrl.net
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net Icom
>> Users
>> Net: Sundays, 1700Z, 14.316 MHz Icom FAQ: http://www.qsl.net/icom/ To
>> support QSL/QTH.net: http://www.qsl.net/donate.html
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net Icom
>> Users Net: Sundays, 1700Z, 14.316 MHz Icom FAQ:
>> http://www.qsl.net/icom/ To support QSL/QTH.net:
>> http://www.qsl.net/donate.html
>> 
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net Icom Users
> Net: Sundays, 1700Z, 14.316 MHz Icom FAQ: http://www.qsl.net/icom/ To
> support QSL/QTH.net: http://www.qsl.net/donate.html
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html