On the aircraft HF Radio depicted at the link below, I know what all the modes are except SVL and SVU. I'm guessing the VL and VU parts might mean Voice Upper and Voice Lower, but I can't seem to find what the S in SVL or SVU stands for. Can someone explain the SVL and SVU modes?
Thanks.
[img]
http://puu.sh/AGFcE/3b06d7b4d6.JPG
[/img]
Moderators: richierich, ua900, PanAm_DC10, hOMSaR
Re: Aircraft High Frequency Radio Modes
Secure Voice Upper / Lower
Secure: fitted with a vocoder
Upper / lower: SSB lobe
From a .mil manual, I'd guess?
Secure: fitted with a vocoder
Upper / lower: SSB lobe
From a .mil manual, I'd guess?
Re: Aircraft High Frequency Radio Modes
ELBOB wrote:Secure Voice Upper / Lower
Secure: fitted with a vocoder
Upper / lower: SSB lobe
From a .mil manual, I'd guess?
I don't know where the drawing originally came from, it showed up in a Google picture search. Although slightly different than this drawing, apparently some Dassault Falcon 50s had a somewhat similar HF radio head with the same modes. I'd like to know who made the Falcon 50 HF radio so I could look up some more info about it.
Thanks for the help.
Re: Aircraft High Frequency Radio Modes
Looking through old magazines, a fairly common fit for trans-Atlantic Falcon 50s was a pair of Collins 718-U5 HF radios. Widespread radio, also adopted by US mil as AN/ARC-174. I'd only expect the .mil units to have the Secure Voice though. Edit: VP-110 Secure Voice Module was the add-on.
There's a 718 fascia down this page a bit:
https://tsc-60.cellmail.com/tsc-60/othe ... index.html
which matches your diagram's layout, but lacks the CW ( Morse ) and Secure Voice units and detents.
There's a 718 fascia down this page a bit:
https://tsc-60.cellmail.com/tsc-60/othe ... index.html
which matches your diagram's layout, but lacks the CW ( Morse ) and Secure Voice units and detents.
Re: Aircraft High Frequency Radio Modes
ELBOB wrote:Looking through old magazines, a fairly common fit for trans-Atlantic Falcon 50s was a pair of Collins 718-U5 HF radios. Widespread radio, also adopted by US mil as AN/ARC-174. I'd only expect the .mil units to have the Secure Voice though. Edit: VP-110 Secure Voice Module was the add-on.
There's a 718 fascia down this page a bit:
https://tsc-60.cellmail.com/tsc-60/othe ... index.html
which matches your diagram's layout, but lacks the CW ( Morse ) and Secure Voice units and detents.
Great info -- thanks very much. I will use it to see what I can find.
Here's the picture of the HF radio I was talking about from a Falcon 50 Pilot Training Manual. Unfortunately, they didn't have much to say about it as far as make or model goes.
[img]
http://puu.sh/AH4vk/045c2161a1.png
[/img]
Re: Aircraft High Frequency Radio Modes
That looks like the later 514A-7 digital header unit for the same radio:
http://knoppix.net/store/514a-7-Collins ... 55768.html
718-U5 manual here, split into chunks:
https://fccid.io/ANATEL/00413-08-03100
Table 5 in Manual 4 discusses the mode options on the various electromechanical and digital header units:
Manual 11 briefly discusses the secure voice modes.
http://knoppix.net/store/514a-7-Collins ... 55768.html
718-U5 manual here, split into chunks:
https://fccid.io/ANATEL/00413-08-03100
Table 5 in Manual 4 discusses the mode options on the various electromechanical and digital header units:
Manual 11 briefly discusses the secure voice modes.
Re: Aircraft High Frequency Radio Modes
ElBob, you must have the magic Google touch. I bet I spent at least 5 hours asking Mr Google where I could find a manual on the 718U-5 without success. Maybe he just doesn't like me. 
You are quite familiar with HF radios -- did, or do, you use them?
I greatly appreciate all your help!
Al
You are quite familiar with HF radios -- did, or do, you use them?
I greatly appreciate all your help!
Al
Who is online
Users browsing this forum: r6russian and 29 guests