From list at ha3ln.hu  Mon Apr 16 16:16:58 2018
From: list at ha3ln.hu (HA3LN)
Date: Mon, 16 Apr 2018 22:16:58 +0200
Subject: [1000mp] Sticking ant relays
Message-ID: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>

Deal All,

I'm wondering whether if any of you faced this before.

I have a FT1000MP MkV Field with an AL-811 with 500W out.

On the cases when the radio switches back from TX to RX it sounds like the
MP's ant unit relay sticks and I can hear barely/nothing at all the 
band. The receiver comes back only after a certain amount of time or if 
I step the foot-switch again couple of times.
If I run barefoot 100W nothing similar happens. I don't have opto 
decoupled TX GND/relay switching, only directly connected with RCA's.

I suspect the RF comes back somehow or maybe the PA ant relay might be 
guilty.
Do you think is this the relay or the switching transistor on the ant 
unit board?
Any other ideas?


Thanks a lot in advance.

73!
Csaba  HA3LN
http://ha3ln.hu/

From w2cdo at live.com  Mon Apr 16 16:24:39 2018
From: w2cdo at live.com (Peter Alterman)
Date: Mon, 16 Apr 2018 20:24:39 +0000
Subject: [1000mp] Sticking ant relays
In-Reply-To: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
References: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
Message-ID: <BLUPR15MB0081444572B3E12FD8685EBB8EB00@BLUPR15MB0081.namprd15.prod.outlook.com>

Csaba,
I had the same symptoms with my Mark V and Alpha 9500.  I now have it occasionally with my K3S and the Alpha.  It is an RFI relay issue on the PA antenna relay circuit.  Do you have more than one antenna connected to the amp? If so, see if better isolation fixes the problem. If not, look to broader RFI abatement strategies.
73, Peter W2CDO






Sent from my Verizon 4G LTE smartphone


-------- Original message --------
From: HA3LN <list at ha3ln.hu>
Date: 4/16/18 4:17 PM (GMT-05:00)
To: All about Yaesu 1000mp <1000mp at mailman.qth.net>
Subject: [1000mp] Sticking ant relays

Deal All,

I'm wondering whether if any of you faced this before.

I have a FT1000MP MkV Field with an AL-811 with 500W out.

On the cases when the radio switches back from TX to RX it sounds like the
MP's ant unit relay sticks and I can hear barely/nothing at all the
band. The receiver comes back only after a certain amount of time or if
I step the foot-switch again couple of times.
If I run barefoot 100W nothing similar happens. I don't have opto
decoupled TX GND/relay switching, only directly connected with RCA's.

I suspect the RF comes back somehow or maybe the PA ant relay might be
guilty.
Do you think is this the relay or the switching transistor on the ant
unit board?
Any other ideas?


Thanks a lot in advance.

73!
Csaba  HA3LN
http://ha3ln.hu/
______________________________________________________________
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From mailbox at otterbein-inet.de  Mon Apr 16 17:24:00 2018
From: mailbox at otterbein-inet.de (Thomas Otterbein)
Date: Mon, 16 Apr 2018 23:24:00 +0200
Subject: [1000mp] Sticking ant relays
In-Reply-To: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
References: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
Message-ID: <01F2CC4D-AB2C-4BF7-AC24-13364CFAE02D@otterbein-inet.de>

Hello, 
please read my following posting. 
May be it helps......

http://www.qth.net/pipermail/1000mp/2006-September/020072.html

73!, Thomas, DG8FBV 
 ---
dg8fbv.de


> Am 16.04.2018 um 22:16 schrieb HA3LN <list at ha3ln.hu>:
> 
> Deal All,
> 
> I'm wondering whether if any of you faced this before.
> 
> I have a FT1000MP MkV Field with an AL-811 with 500W out.
> 
> On the cases when the radio switches back from TX to RX it sounds like the
> MP's ant unit relay sticks and I can hear barely/nothing at all the band. The receiver comes back only after a certain amount of time or if I step the foot-switch again couple of times.
> If I run barefoot 100W nothing similar happens. I don't have opto decoupled TX GND/relay switching, only directly connected with RCA's.
> 
> I suspect the RF comes back somehow or maybe the PA ant relay might be guilty.
> Do you think is this the relay or the switching transistor on the ant unit board?
> Any other ideas?
> 
> 
> Thanks a lot in advance.
> 
> 73!
> Csaba  HA3LN
> http://ha3ln.hu/
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:1000mp at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From kristijan.persic at pu.t-com.hr  Tue Apr 17 01:12:03 2018
From: kristijan.persic at pu.t-com.hr (Kristijan Persic,9A4WY)
Date: Tue, 17 Apr 2018 07:12:03 +0200
Subject: [1000mp] Sticking ant relays
In-Reply-To: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
References: <b4f9c643-353c-0235-768e-f7481774d84b@ha3ln.hu>
Message-ID: <18e13b3f-e76a-d079-78dc-296ab82b1230@pu.t-com.hr>

Csaba...
please disconnect all cables from PA and leave connected only TRX inline 
with antenna.
You have to be sure where the problem is...in TRX or PA. Ameritrons has 
cheap relays in amplifiers, especially in older serial numbers.That 
could be a problem.
Test it few days to see what will happen...
73..Kiko,9A4WY

On 16.4.2018. 22:16, HA3LN wrote:
> Deal All,
>
> I'm wondering whether if any of you faced this before.
>
> I have a FT1000MP MkV Field with an AL-811 with 500W out.
>
> On the cases when the radio switches back from TX to RX it sounds like 
> the
> MP's ant unit relay sticks and I can hear barely/nothing at all the 
> band. The receiver comes back only after a certain amount of time or 
> if I step the foot-switch again couple of times.
> If I run barefoot 100W nothing similar happens. I don't have opto 
> decoupled TX GND/relay switching, only directly connected with RCA's.
>
> I suspect the RF comes back somehow or maybe the PA ant relay might be 
> guilty.
> Do you think is this the relay or the switching transistor on the ant 
> unit board?
> Any other ideas?
>
>
> Thanks a lot in advance.
>
> 73!
> Csaba? HA3LN
> http://ha3ln.hu/
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:1000mp at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>


From kb9gkc at aol.com  Tue Apr 17 16:57:39 2018
From: kb9gkc at aol.com (Douglas Cohen)
Date: Tue, 17 Apr 2018 16:57:39 -0400
Subject: [1000mp] Sticking ant relays
In-Reply-To: <18e13b3f-e76a-d079-78dc-296ab82b1230@pu.t-com.hr>
Message-ID: <162d56612d7-1795-30a9a@webjas-vad188.srv.aolmail.net>

Hello,
?
My FT-1000MP started acting the same way a few years ago. ?
?
It turned out to be band pass filter relays that had worn relay contacts and a few cold solder joints on that board. Replaced the failed relays and resoldered the board and the radio has worked fine for the past 5 years.
?
Douglas in Green Bay?