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Old 06-01-2014, 12:28   #1
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SSB Pactor location

Quick question.

Is it OK to locate the pastor modem on top of the SSB? If not how far should it be away from the set?

Cheers

Steve
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Old 06-01-2014, 12:57   #2
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Re: SSB Pactor location

This should be OK. Just make sure you don't block the air-flow.
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Old 06-01-2014, 13:54   #3
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Re: SSB Pactor location

cheers Paul
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Old 06-01-2014, 14:46   #4
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Re: SSB Pactor location

Ours sat on top of our Icom 710 for years and it worked perfectly. Chuck
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Old 06-01-2014, 14:52   #5
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Re: SSB Pactor location

Ours sits on a shelf about an inch above the transceiver.
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Old 06-01-2014, 16:05   #6
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Re: SSB Pactor location

Sounds good guys cheers
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Old 07-01-2014, 23:38   #7
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Re: SSB Pactor location

There are two rules to reduce the pickup of HF into the Pactor/Notebook:
- you will get a capacitive pickup when your cable from
notebook > Pactor to the transceiver
are near the HF output from transceiver to tuner
Better is a short cable.
- you will get magnetic pickup when the cable from
notebook > Pactor> transceiver
forms a loop.
Clipping ferrits is a method to reduce the pickup
Wilhelm
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Old 08-01-2014, 00:40   #8
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Re: SSB Pactor location

crap! My cables are pre cut and would end up looped. So maybe move laptop and Pactor from the M710?
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Old 08-01-2014, 01:21   #9
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Re: SSB Pactor location

we have an 802 and put the radio itself on a seat bulkhead and had just enough room under it to put the pactor modem - they are had to glove
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Old 08-01-2014, 01:40   #10
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Re: SSB Pactor location

Look, many of us have the modem mounted on top of or next to the transceiver and suffer no problems. If I were you, I would not listen to worry warts until you give it a go yourself. Try it out with a temporary installation... if you have no feedback or other problems, fix it permanently in place. Damn the "experts", full speed ahead!

IF problems do arise, buy some cip-on ferrites and start hanging them on the cables, monitoring the problem as you go. Likely this will cure things.

Honestly, it is awful easy to over-think and over-worry about such matters. A little experimentation will answer a lot of questions.

good luck, mate.

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Old 08-01-2014, 01:50   #11
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Re: SSB Pactor location

Quote:
Originally Posted by NorthPacific View Post
crap! My cables are pre cut and would end up looped. So maybe move laptop and Pactor from the M710?
When you will shorten the pre cut cable you might produce an error when soldering it.

To avoid a magnetic pick up coil arange the cable in a zig zag to the required length.
And fix the cable with cable binders.
When using clip ferrits its best to buy a magnetic material optimal for HF.
But normal clip ferrits for computer related frequencies do a goog job too.
Wilhelm
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Old 08-01-2014, 02:13   #12
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Re: SSB Pactor location

BTW, while we've had no problem from the modem being close to the transmitter, we have had problems with the touch pad on a laptop whilst actually transmitting. We have found that it is best to not actually touch the pad while on the air... causes various spurious actions, including freezing up the CPU.

Cheers,

Jim
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Old 08-01-2014, 02:26   #13
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Re: SSB Pactor location

Jim is correct. Try it first before you start thinking about another spot. Our modem is strapped to the top of our Icom 802For the past 10 years and we have had no issues with it. Just be sure to use plenty of chokes. But you would want to use these no matter where you installed the modem.

Good luck

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Old 08-01-2014, 05:33   #14
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Re: SSB Pactor location

Mine is two inches below an M700Pro. Once in a while I loose communication between the SCS and the notebook. Its not frequent enough to invest any time in it.
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Old 08-01-2014, 06:08   #15
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Re: SSB Pactor location

Put ferrites on all the goes in and goes out wires to the Pactor. Put ferrites on both ends of the USB cable. While 'trying it' is a good approach, be aware that the failures occur at specific frequencies. So it may work find at 8MHz and fail at 10MHz. It may work fine at low power and fail at higher powers. A typical error is 'lost connection' with the Pactor. This usually means you are getting HF into the USB channel.
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