Those are the Transmitter receiver I used to fix in Vietnam. The PRC77 that had a solid state out put. The old PRC25 had a tube final state. They really could be a pain but in the field, out on patrol they always needed someone to fix them.
We had this set up or a 524 setup in our hummers till oct 1992. We brought them down one day to a refit shop and they took all this out including the antenna base and put sincgars in. HHC 2/325 A.I.R. Bn Mortars.
Thank you for this video. I worked at Electrospace Corp in Westbury, NY in the early 1970s. I was an electronic tech just out of tech school and my job was to align the IF modules on the PRC-77. They would take a plastic sheet with the IF waveform and place it on an oscilloscope. I would align the module to match the waveform on the sheet. Eventually I was promoted to work on a high power system. Arnold Wolf was the president of the company. The engineering lab was also working on AM stereo and almost had it working but the company went bankrupt by 1975. It was a great place to work and I'm not surprised there are so many PRC-77s around today as they were built like a tank. They live on.
Thank you, I just ran up on your videos. To be honest with you most of the time what happened is that when we got our new gear we sold all our old ww2, Korea, Vietnam era stuff to these other countries and now they are just making their way back to us as they replaced and modernized . They now are handed down to post military enthusiasts around the world. Ret. vet. Here.
I have a 1967 Prc-77 and the Am-2060 in my shack powered by a 24 volt power supply.The antenna i'm using is a Yagi I made up vertical for FM use. Also have a RF amplifier made by General Dynamics seems it is a trial amp that was tested out in the late sixties it has stickers on it for the prc-25 and 77 as well as the prc-6 and prc-10 radios it states prc-6 will put out 20 watts the prc-10 will also put out 20 watts the prc-25 and 77 are stated to put out 30 watts with this RF amp i haven't tried it as yet but will be doing so in the near future.Jim
The "Prick" 77! 🤣👍 I was a FROC(field radio operator carrier) in the Marine Corps in the 80s, and the 77 was what we carried on our backs. I remember the Army doggies with their new radios laughing at us still using stuff from Vietnam. Bastards. 🤣
sir that toggle switch that does the 25 Mhz spacing is NOT the X-MODE...There is a X-MODE PLUG on the bigger RT-524 Vehicular Radio set and that plug is used to attach the VINSON Communication Security package the KY-57...AND since you have a PRC-77 family radio...the POWER plug/receptacle can use the interconnection cable that connect the PRC-77 and the KY-57 COMSEC package...so in a way even it is not labeled on the RT itself the 77's power receptacle can be called it's X-MODE plug. But the Power plug on this PRC-77 is used MAINLY to connect the Vehicle Power Adapter so you can use the Vehicle power supply through the MT-1029 AKA...the Mounting Base Electrical Equipment, AKA the MBEE and not need to use the onboard Batteries in the bottom of the radio set. So lets get the terms right for your listeners.
Thanks for the videos! I also like collecting items from the world wars. I just watched a older video of yours about using milk crates! Guth dairy!? I know exactly where those are from! Cheers!
I was in the USAF in the mid-80s. I was part of a tactical radar unit meant to setup a TPS43E behind enemy lines (if the balloon went up).My commander's command m1009 had a HF radio, complete with a big whip antenna. Was this a PRC-77? I mean, it HAS been the better part of 40 years. Just curious
There are many radio sets that fall into these type fm receiver transmitters. The RTs that were most commonly used were the rt524 and the rt248. The prc77 was more commonly used for line infantry units in backpack or battery powered mode for non mechanized infantry. I was in 3/187inf Rakassans from 91-3 and we had a lot of the prc77s but only two or three with this configuration in a vehicle. We mainly had the AN/VRC46 or AN/VRC47 radio setups before the SINCGARS (single channel ground/air radio system) radios that used frequency hopping instead of a dedicated frequency.
No extra channel s . The x mode plug is for comsec . Comsec is a sepret system that's connect Ed though the x mode jack . You will find that the x mode jack has a plug in it . That plug has circuts to connect the system when the comsec is not in use .
Can you please show backside of this system and its connections.etc. I am interested in knowing if a M38A1 with MX-6707 antenna connects to both rear connector on AM1777 amplifier, and also coax cable also connects to PRC 77 radio "ANT" port at the same time. would this be a correct ?
Hello, I have a few questions about an Austrian PRC77 before connecting the voltage to the radio. Can you give me some advice? I have a: - mounting MT1029/VRC - amplifier AM1777 - PRC 77 - Range booster PP770 - cable CG-530F/U - cable CX-4722AN/VRC - antenna MX-607/VRC - wip AS-1730/VRC - wip AT-1095/VRC Everything is assembled and connected. I have a 24V vehicle and the PRC-77 radio is maximum 15V. The MT1029 base has a 24V vehicle voltage supply. The AM1777 amplifier is mounted on the MT1029 subbase. Does the AM1777 support 24V from the baseplate? If so, is there a transo in the AM1777 to reduce the voltage to the max 15V radio voltage? I'd like to know before plugging the battery into the set so as not to deduct the radio and its amplifier. Thank you in advance for your valuable advice, Christian
Hello, I didn't quite understand what you were saying. I don't speak English and I'm getting by with a translation system. Can you use short sentences, it's the easiest to translate. Thank you for your understanding, Christian
@@WW2JeepandRifle Excellent! I am in the process of getting a functioning RT-841/PRC-77 with all accessories, an AM-1777 , and a backpack. I have the MT-1029 and 14.5 foot antenna on M38A1 CDN3. I enjoy your videos, and learn a lot. Thanks for getting back to me. If one has a radio in the vehicle, it would be nice to be able to communicate with someone else.
@@WW2JeepandRifle I have an MX-6707-VRC antenna mounted on an M38A1. There is a coax cable that comes from the antenna and attaches to "ANT" connection on the PRC-77. There is also a 12 pin 22 ft cable ( CX4722A/VRC), that connects at the antenna and then over to the back of the AM-1777. Are both of these cable connected at these points at the same time?
The PRC-77 is a very interesting radio, very strange seeing these older military radios compared to the ones I work with now
Those are the Transmitter receiver I used to fix in Vietnam. The PRC77 that had a solid state out put. The old PRC25 had a tube final state. They really could be a pain but in the field, out on patrol they always needed someone to fix them.
We had this set up or a 524 setup in our hummers till oct 1992. We brought them down one day to a refit shop and they took all this out including the antenna base and put sincgars in. HHC 2/325 A.I.R. Bn Mortars.
Loved the 524 so reliable used todo fieldretrans with veh mounted 524s
Thank you for this video. I worked at Electrospace Corp in Westbury, NY in the early 1970s. I was an electronic tech just out of tech school and my job was to align the IF modules on the PRC-77. They would take a plastic sheet with the IF waveform and place it on an oscilloscope. I would align the module to match the waveform on the sheet. Eventually I was promoted to work on a high power system. Arnold Wolf was the president of the company. The engineering lab was also working on AM stereo and almost had it working but the company went bankrupt by 1975. It was a great place to work and I'm not surprised there are so many PRC-77s around today as they were built like a tank. They live on.
Thank you, I just ran up on your videos. To be honest with you most of the time what happened is that when we got our new gear we sold all our old ww2, Korea, Vietnam era stuff to these other countries and now they are just making their way back to us as they replaced and modernized . They now are handed down to post military enthusiasts around the world.
Ret. vet. Here.
P.s. thanks for doing the videos and getting the information out there.
I have a 1967 Prc-77 and the Am-2060 in my shack powered by a 24 volt power supply.The antenna i'm using is a Yagi I made up vertical for FM use.
Also have a RF amplifier made by General Dynamics seems it is a trial amp that was tested out in the late sixties it has stickers on it for the prc-25 and 77 as well as the prc-6 and prc-10 radios it states prc-6 will put out 20 watts the prc-10 will also put out 20 watts the prc-25 and 77 are stated to put out 30 watts with this RF amp i haven't tried it as yet but will be doing so in the near future.Jim
The "Prick" 77! 🤣👍
I was a FROC(field radio operator carrier) in the Marine Corps in the 80s, and the 77 was what we carried on our backs. I remember the Army doggies with their new radios laughing at us still using stuff from Vietnam. Bastards. 🤣
sir that toggle switch that does the 25 Mhz spacing is NOT the X-MODE...There is a X-MODE PLUG on the bigger RT-524 Vehicular Radio set and that plug is used to attach the VINSON Communication Security package the KY-57...AND since you have a PRC-77 family radio...the POWER plug/receptacle can use the interconnection cable that connect the PRC-77 and the KY-57 COMSEC package...so in a way even it is not labeled on the RT itself the 77's power receptacle can be called it's X-MODE plug. But the Power plug on this PRC-77 is used MAINLY to connect the Vehicle Power Adapter so you can use the Vehicle power supply through the MT-1029 AKA...the Mounting Base Electrical Equipment, AKA the MBEE and not need to use the onboard Batteries in the bottom of the radio set. So lets get the terms right for your listeners.
Thanks for the videos! I also like collecting items from the world wars. I just watched a older video of yours about using milk crates! Guth dairy!? I know exactly where those are from! Cheers!
Where do you purchase this type of equipment? Been looking for PRC-77 for years.
I was in the USAF in the mid-80s. I was part of a tactical radar unit meant to setup a TPS43E behind enemy lines (if the balloon went up).My commander's command m1009 had a HF radio, complete with a big whip antenna. Was this a PRC-77? I mean, it HAS been the better part of 40 years. Just curious
There are many radio sets that fall into these type fm receiver transmitters. The RTs that were most commonly used were the rt524 and the rt248. The prc77 was more commonly used for line infantry units in backpack or battery powered mode for non mechanized infantry. I was in 3/187inf Rakassans from 91-3 and we had a lot of the prc77s but only two or three with this configuration in a vehicle. We mainly had the AN/VRC46 or AN/VRC47 radio setups before the SINCGARS (single channel ground/air radio system) radios that used frequency hopping instead of a dedicated frequency.
More videos-on prc 77 please
No extra channel s . The x mode plug is for comsec . Comsec is a sepret system that's connect Ed though the x mode jack . You will find that the x mode jack has a plug in it . That plug has circuts to connect the system when the comsec is not in use .
I’m looking to get my vehicle outfitted, any vender suggestions?
Very nice videos! Suscribed!!
Can you please show backside of this system and its connections.etc. I am interested in knowing if a M38A1 with MX-6707 antenna connects to both rear connector on AM1777 amplifier, and also coax cable also connects to PRC 77 radio "ANT" port at the same time. would this be a correct ?
Hello,
I have a few questions about an Austrian PRC77 before connecting the voltage to the radio.
Can you give me some advice?
I have a: - mounting MT1029/VRC
- amplifier AM1777
- PRC 77
- Range booster PP770
- cable CG-530F/U
- cable CX-4722AN/VRC
- antenna MX-607/VRC
- wip AS-1730/VRC
- wip AT-1095/VRC
Everything is assembled and connected.
I have a 24V vehicle and the PRC-77 radio is maximum 15V.
The MT1029 base has a 24V vehicle voltage supply.
The AM1777 amplifier is mounted on the MT1029 subbase.
Does the AM1777 support 24V from the baseplate?
If so, is there a transo in the AM1777 to reduce the voltage to the max 15V radio voltage?
I'd like to know before plugging the battery into the set so as not to deduct the radio and its amplifier.
Thank you in advance for your valuable advice,
Christian
You're good to go. 24V vehicle power connected to MT1029 with AM1777. AM1777 connected to PRC-77 via tether without a battery installed in the radio.
Hello,
I didn't quite understand what you were saying.
I don't speak English and I'm getting by with a translation system.
Can you use short sentences, it's the easiest to translate.
Thank you for your understanding,
Christian
It is safe to connect 24V to the equipment you listed. Be sure to remove the battery from your PRC-77.
Hello,
Ok, I get it now.
Thank you for your help.
All the best,
Hello,
Why do I have to remove the PRC77-0 batteries on the AM1777?
Kind regards,
Christian
So dose it only work off 24 volts or could i hook it up to a 12 volt car cigarette lighter port ?
How can i extend the scope of this radio...i know that it basic reach 5 mile...how can i extend this distance ??
Longer antenna
Can this work off a 12 volt car with a cigarette lighter port
Can these radios communicate with any civilian type radios? Ham, CB, FRS, etc.?
Ham radios that operate FM in the 6 meter band can communicate with these radios
@@WW2JeepandRifle Excellent! I am in the process of getting a functioning RT-841/PRC-77 with all accessories, an AM-1777 , and a backpack. I have the MT-1029 and 14.5 foot antenna on M38A1 CDN3. I enjoy your videos, and learn a lot. Thanks for getting back to me. If one has a radio in the vehicle, it would be nice to be able to communicate with someone else.
@@WW2JeepandRifle I have an MX-6707-VRC antenna mounted on an M38A1. There is a coax cable that comes from the antenna and attaches to "ANT" connection on the PRC-77. There is also a 12 pin 22 ft cable ( CX4722A/VRC), that connects at the antenna and then over to the back of the AM-1777. Are both of these cable connected at these points at the same time?
Military radio AM-598. AM-598/U
This is not those radio sets
Amplifier +prc 77 = 160