开云体育

Tr7 Refurb

Mike Davidsohn G3ZCC All Messages By This Member #84742 Edited Hi Everyone? It did fire up but moving on to its side, went out of lock. It has a wire off, white and green, comes from the area under the vfo can and was lying near the front of the can. Going to upload a picture? Does anyone have any idea where it goes. Thanks Mike G3ZCC Ps spent 4 hrs trying to find where it goes to. Tried putting a bright light print side. There is what looks like a pin diode going to an rfc in the space under the PTO. The white green wire, reads,continuity to the RFC. The length of the wire reaches almost to the switch area but I can't see where it could have detached from. See my pictures and you can see where on the print the wire is connected to. There is like a U shape by it. Looking at the schematic I am hazarding a guess that as the VCO is out of lock the wire connects PTO signal to the digital side. Thanks Mike G3ZCC
Jim Shorney All Messages By This Member #84750 Use the parent board schematic and pictorial to identify the connection point of the wire. That will help you deduce its function and where the other end belongs. On Fri, 09 May 2025 19:24:47 -0700 "Mike Davidsohn G3ZCC via groups.io" <mike@...> wrote: There is what looks like a pin diode going to an rfc in the space under the PTO. The white green wire, reads,continuity to the RFC. -- 73 -Jim NU0C
Mike Davidsohn G3ZCC All Messages By This Member #84758 Thanks Jim, going to take a closer look this afternoon. According to the Schematic it says it goes to PTO output, that could well be what the wire is. ?the PTO connections look OK though. ? Regards Mike G3ZCC
Mike Davidsohn G3ZCC All Messages By This Member #84760 Hi all, it is the junction of RFC2 and CR9. It is as I thought the lead that goes to the PTO output. But can't see where that resides. Is there a PTO schematic? Does it go in parallel with the existing lead? Thanks again Mike G3ZCC ?
Mike Davidsohn G3ZCC All Messages By This Member #84764 I see it puts,PTO output into the Translator. Try as i do can't see where the output pin .is. there are two wires fixed from the main board to the pto, going to have to scope them and see which one carries,RF. It maybe that one pin is supposed to have two wires. Totally stuck now, it's all there is to do before boxing it up and goingvonvtg3 air. Mike? G3ZCC
Gary WB6OGD All Messages By This Member #84765 开云体育 I don’t know for sure but in the 4-Line, the wires are attached inside the PTO. ?Probably why you? don’t see anyplace that the wire used to attach. 73, Gary WB6OGD toggle quoted message Show quoted text On May 10, 2025, at 12:21?PM, Mike Davidsohn G3ZCC via groups.io <mike@...> wrote: ? I see it puts,PTO output into the Translator. Try as i do can't see where the output pin .is. there are two wires fixed from the main board to the pto, going to have to scope them and see which one carries,RF. It maybe that one pin is supposed to have two wires. Totally stuck now, it's all there is to do before boxing it up and goingvonvtg3 air. Mike? G3ZCC
Mike Davidsohn G3ZCC All Messages By This Member #84766 Thanks Gary Didn't want to take it apart lol? Regards Mike
Stan Gammons All Messages By This Member #84769 开云体育 How many wires are going to the PTO?? Mine has 4, like the RV7 VFO.? Red, Black, Brown and Green.?? Brown is on the right side of the PTO looking at it from the front and all of the others go into the bottom of the PTO. 73 Stan KM4HQE On 5/10/25 15:22, Mike Davidsohn G3ZCC via groups.io wrote: toggle quoted message Show quoted text Thanks Gary Didn't want to take it apart lol? Regards Mike
Jim Shorney All Messages By This Member #84776 +10V, RF out, RIT, and Ground. There is a schematic of the PTO in the RV7 manual. On Sun, 11 May 2025 00:17:33 +0000 "Stan Gammons via groups.io" <buttercup11421@...> wrote: How many wires are going to the PTO? Mine has 4, like the RV7 VFO. Red, Black, Brown and Green. Brown is on the right side of the PTO looking at it from the front and all of the others go into the bottom of the PTO. 73 Stan KM4HQE On 5/10/25 15:22, Mike Davidsohn G3ZCC via groups.io wrote: Thanks Gary Didn't want to take it apart lol Regards Mike -- 73 -Jim NU0C
Mike Davidsohn G3ZCC All Messages By This Member #84777 Hi everyone. Thanks for all the help. I'm going to try and find a copy of the RV7 manual for the future. But I had an idea last night, delved into my spares cabinet where I had my spare PTO. although the wires were removed there were just enough left to show me where the wire goes. Remade the connection and covered it with heatshrink. Turned on the TR7 and up it came. Now it's going to be replace the DR7 and the two 7805 regulators which are missing and it should be good to go. Kind Regards Mike G3ZCC ? ?

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