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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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4th May 2021, 9:15 pm | #1 |
Heptode
Join Date: Dec 2003
Location: South Yorkshire, UK.
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Seavoice RT100
I recently bought another load of junk off eBay as my wife would say. It includes a marine band radio, a hand held direction finder and a sonar display.
The radio is a RT100. I think this is a vhf marine band radio. It will transmit into a test set but it’s dead on receive. It has separate crystal for transmit and receive 24 in total but I’m not certain if I’m even applying the correct frequency for receiving. I think they can be setup for split frequency operating but not sure. I haven’t pulled any crystal yet for inspection but wondered if anyone had come across them before. It could be interesting try and convert it for 2m use. Does anyone have any knowledge about the RT100. Thanks Chris
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4th May 2021, 9:49 pm | #2 |
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Re: Seavoice RT100
It's a VHF FM transceiver. Channel 16 is the calling channel and it's simplex on 156.800MHz. It has the most used channels fitted unless someone's removed the crystals! Crystals these days are rather expensive now that synthesisers are so cheap!
You might be able to hear Humber Radio on channel 16 but I don't know what your local band plan is. It should all be on here..... https://www.offshoreblue.com/comms/vhf-uk.php
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4th May 2021, 9:58 pm | #3 |
Heptode
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Re: Seavoice RT100
Thanks for the information. I can hear a slight hiss but nothing more. I will try sweeping the frequency see if I can pick anything up.
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5th May 2021, 12:21 am | #4 |
Hexode
Join Date: Mar 2011
Location: Wilstead, Bedfordshire, UK.
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Re: Seavoice RT100
Sorry entered my query in the wrong place
Regards Bill |
5th May 2021, 10:29 am | #5 |
Rest in Peace
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Location: Basildon, Essex, UK.
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Re: Seavoice RT100
This radio was possibly made before the marine channel spacing was changed in the early 1970's and may not be suitable to use nowadays.
Mike |
5th May 2021, 11:10 am | #6 |
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Re: Seavoice RT100
Electronic Laboratories (Seafarer) Poole was the company that developed out of Cyldon (Sydney S. Bird and Sons) after many many changes of name and direction. By the time this was made its unclear to me if anything of the original company was left.
I am asking a friend who did his apprenticeship there if he can shed light his Father was Chief designer there for many of the Seafarer and Seafix products. Cheers Mike T
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5th May 2021, 12:22 pm | #7 |
Heptode
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Re: Seavoice RT100
I bought a box of various junk which is proving entertaining. The DF gun with its large ferrite rod and liquid filled compass is very interesting. I think the LF beacon were superseded by GPS many years ago. It does tune into radio 4 long wave which is kind of fun.
Regards the transmitter I am aware of licensing conditions. I think it does use the old channel spacing
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5th May 2021, 12:55 pm | #8 |
Octode
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Location: Bletchley, Buckinghamshire, UK.
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Re: Seavoice RT100
You should still be able to find some beacons on the Seafix. The marine ones have gone but some aeronautical beacons are still active.
And it's quite a collector's item, especially as it still has the compass. |
5th May 2021, 6:38 pm | #9 | |
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Re: Seavoice RT100
Quote:
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5th May 2021, 9:46 pm | #10 |
Heptode
Join Date: Dec 2003
Location: South Yorkshire, UK.
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Re: Seavoice RT100
I will have to have a twiddle see if I can hear anything apart from radio 4 !
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5th May 2021, 11:13 pm | #11 |
Pentode
Join Date: May 2006
Location: Poole, Dorset, UK.
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Re: Seavoice RT100
Hi
I worked at Seafarer in 1976 when the RT100 was being made at about 100/week Yes, it can be tuned to 2m- crystals permitting...and several were. Coincidentally, I gave away my copy of the service and user manuals 2 weeks ago. I expect that I could borrow them it's ok for the current channels and, AFAIR, had 1 or 2 split channels for link calls. good luck John g8jmb |
6th May 2021, 1:40 am | #12 |
Heptode
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Re: Seavoice RT100
You have a selection of the most commonly used channels on the old band plan-
Channel 6 - 156.300 simplex - intership secondary Channel 8 - 156.400 simplex - intership primary Channel 12 - 156.600 simplex - Port operations Channel 14 - 156.700 simplex - Port operations Channel 16 - 156.800 simplex - Distress, safety, calling All the high number channels are duplex port operations. Don't know where you are in South Yorkshire, you might get some traffic on Ch16 from the Humber Radio coast station if they're still in operation (it's 55 years since I was up and down that coast!) and there might some activity around Whitby.
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6th May 2021, 12:38 pm | #13 |
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Re: Seavoice RT100
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6th May 2021, 1:02 pm | #14 |
Heptode
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Re: Seavoice RT100
Thanks for the channel information that’s really useful. I thought it could have been split as I don’t have anything’s on receive when fed with a signal generator. I have another radio on the bench right now, but I will pull some of the Crystals and check the frequency if I can identify the receiver IF.
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6th May 2021, 2:05 pm | #15 | |
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Re: Seavoice RT100
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Cheers Roger |
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