Memories of 4 yrs of repairing Collins URG 10's and 3's , 4CX10000 and 4CX3000 transmitters. 4 of the 10's had antenna matrix and complete remote dialin to select 4 ch SSDB and AM, really cool system of its time.
I was on one of the older boats the non-nuclear (USS Blueback SS-581) it also had this transmitter on it. I wish I could have had a little better look but the OMSI tour guide had to many people and rushed everyone through.
I believe the pre-selector can be changed to a post-selector. If you unscrew the pre-selector plate on the front, you’ll find the label for a post-selector. Just flip it over and you’ll find the label for post-selector. Inside the unit you’ll find a rather large black knob near the front of the unit. Moving this knob to the opposite position will complete the change from a pre to a post selector. Hope this helps.
That is interesting. I did read that somewhere but had not looked to deep into it yet. It seemed odd that someone would build something that had a dual purpose. It kind of defeats the make an extra buck method (but I guess you could sell twice as many with no additional engineering) hi hi
I had the VHF/UHF transceivers my buddy had the HF and the main thing I remember is he always complained about what a pain in the rear doing an alignment was on that unit. just as a friendly reminder should you need to adjust anything in the URT-23 set make sure to let everything warm up, I think my buddy used to run them for 4 hours before he'd start tweaking anything. My WSC-3's were so much more reliable and forgiving.
That’s sound advice, I have the SRC-21 (URC-9) the previous generation prior to the WSC-3. I am on the hunt for a WSC-3 and actually just picked up a service publication for it on my last gear run.
Repaired those in the navy. Watched a guy on Westpac almost kill himself working on the pa section. We had 4 on one tuner coupler to a long wire feed from helix from the #1 transmitter room. LPH-3.
This one is giving me problems. I will address them in a video next week. I have the 400hz for the fan, 115 for the accessories but it would seem that T1 is bad. Tap 18 (that supplies the 12v remote power is grounded) this is not allowing it to switch to operate and keeping the HV side powered off. I get nothing from the secondary side of T1 but have the proper power coming in. Luckily I have an extra T1 but I need to ensure the fault is fixed. It blew out the 12v feed on the A5 card which does not have any fused protection. It would be fun to find someone in SoCal that has worked directly on these to help out. I was an AT2 and worked on aviation communications systems (mainly JTIDS)
From my experience with them as our primary HF linear on HMAS Swan, we had 5 23(V)(c), installed brand new after a refit, after solving a manufacturing problem, (unsoldered wire terminal causing a horrible intermittent fault), they worked like a dream, I can't remember having any real problem with them. The intermittent fault was a real bitch, we even ended up pulling apart the valve base to see if that was at fault. Finally a good pair of eyes (mine) noticed the terminal that had not been soldered. Side note, this fault was as we were preparing for sea trials (ready for sea) and our battle problem, we worked almost 24/7 for the best part of a week to get all 5 units working. I remember getting to bed at 0400 one might and the chief was getting me out of beg at 8 am as I had missed the morning muster. No rest for the wicked. Good times indeed.... 😂🤣🤣🤣
Based on knowledge from individuals such as yourself I would agree with the reliability of these transmitters. When you look at the longevity (60s to the 2000s) and the amount of western militaries that used the 23 it can only be assumed that it’s a good product.
We had four of them on the sub tender I was on ( USS ORION AS-18 ) and these transmitters were my responsibility. I had very few issues with them besides replacing tubes and an occasional diode that went bad in the protection circuitry. These were also used on fast attack subs but I don't remember what antenna they used.
When I was on surface ships, we ran them continuous and kept up a TTY circuit 24/7/365. On subs, there were 2 URT-23's, one "special", both were kept in standby, we rarely transmitted.
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Memories of 4 yrs of repairing Collins URG 10's and 3's , 4CX10000 and 4CX3000 transmitters. 4 of the 10's had antenna matrix and complete remote dialin to select 4 ch SSDB and AM, really cool system of its time.
This was standard equipment on Sturgeon Class attack boats in the 70’s and 80’s
I was on one of the older boats the non-nuclear (USS Blueback SS-581) it also had this transmitter on it. I wish I could have had a little better look but the OMSI tour guide had to many people and rushed everyone through.
I believe the pre-selector can be changed to a post-selector. If you unscrew the pre-selector plate on the front, you’ll find the label for a post-selector. Just flip it over and you’ll find the label for post-selector. Inside the unit you’ll find a rather large black knob near the front of the unit. Moving this knob to the opposite position will complete the change from a pre to a post selector. Hope this helps.
That is interesting. I did read that somewhere but had not looked to deep into it yet. It seemed odd that someone would build something that had a dual purpose. It kind of defeats the make an extra buck method (but I guess you could sell twice as many with no additional engineering) hi hi
I had the VHF/UHF transceivers my buddy had the HF and the main thing I remember is he always complained about what a pain in the rear doing an alignment was on that unit. just as a friendly reminder should you need to adjust anything in the URT-23 set make sure to let everything warm up, I think my buddy used to run them for 4 hours before he'd start tweaking anything. My WSC-3's were so much more reliable and forgiving.
That’s sound advice, I have the SRC-21 (URC-9) the previous generation prior to the WSC-3. I am on the hunt for a WSC-3 and actually just picked up a service publication for it on my last gear run.
Talk about alignments. You should look up the UrC-9. I have a video on that here also. K6YIC
cannot wait to this rig doing QSOs
73
DE HZ1YA
Repaired those in the navy. Watched a guy on Westpac almost kill himself working on the pa section. We had 4 on one tuner coupler to a long wire feed from helix from the #1 transmitter room. LPH-3.
This one is giving me problems. I will address them in a video next week. I have the 400hz for the fan, 115 for the accessories but it would seem that T1 is bad. Tap 18 (that supplies the 12v remote power is grounded) this is not allowing it to switch to operate and keeping the HV side powered off. I get nothing from the secondary side of T1 but have the proper power coming in. Luckily I have an extra T1 but I need to ensure the fault is fixed. It blew out the 12v feed on the A5 card which does not have any fused protection. It would be fun to find someone in SoCal that has worked directly on these to help out. I was an AT2 and worked on aviation communications systems (mainly JTIDS)
How dependable are the URT-23's will they actually run for more than a few hours without constant maintenance like a lot of mil gear I've used?
From my experience with them as our primary HF linear on HMAS Swan, we had 5 23(V)(c), installed brand new after a refit, after solving a manufacturing problem, (unsoldered wire terminal causing a horrible intermittent fault), they worked like a dream, I can't remember having any real problem with them.
The intermittent fault was a real bitch, we even ended up pulling apart the valve base to see if that was at fault. Finally a good pair of eyes (mine) noticed the terminal that had not been soldered.
Side note, this fault was as we were preparing for sea trials (ready for sea) and our battle problem, we worked almost 24/7 for the best part of a week to get all 5 units working.
I remember getting to bed at 0400 one might and the chief was getting me out of beg at 8 am as I had missed the morning muster. No rest for the wicked.
Good times indeed.... 😂🤣🤣🤣
Based on knowledge from individuals such as yourself I would agree with the reliability of these transmitters. When you look at the longevity (60s to the 2000s) and the amount of western militaries that used the 23 it can only be assumed that it’s a good product.
We had four of them on the sub tender I was on ( USS ORION AS-18 ) and these transmitters were my responsibility. I had very few issues with them besides replacing tubes
and an occasional diode that went bad in the protection circuitry. These were also used on fast attack subs but I don't remember what antenna they used.
When I was on surface ships, we ran them continuous and kept up a TTY circuit 24/7/365. On subs, there were 2 URT-23's, one "special", both were kept in standby, we rarely transmitted.
Put some damn audio in your videos, so that we can hear what you’re saying!!!
Sounds like you have an audio issue on your end. 19.5k viewers have not voiced this issue.
Adjustment of final transformer contact position done in the driver transformer assembly.