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Hi all, I have an issue with the display board in one of my Drake TR-7's and it's the board for sure because I installed the problem board in another TR-7 and it has the EXACT same issue: On the TR-7 with the issue it was fine and not used for a while, turned it on and now the display shows 51.950 on all bands. The VFO will move it up and down but of course it will still be in that range on all bands but it does receive and transmit. I see this issue has been discussed on this web site but I don't see any answers? Any help appreciated, I am hoping someone has figured out how to fix this Specific issue. Adam Farber W4AJF
Cooper City, FL
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I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c Bob KF8IY
On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF <adamf@...> wrote:
> Hi all, I have an issue with the display board in one of my Drake
> TR-7's and it's the board for sure because I installed the problem
> board in another TR-7 and it has the EXACT same issue: On the TR-7
> with the issue it was fine and not used for a while, turned it on and
> now the display shows 51.950 on all bands. The VFO will move it up and
> down but of course it will still be in that range on all bands but it
> does receive and transmit. I see this issue has been discussed on this
> web site but I don't see any answers?
Any help appreciated, I am hoping someone has figured out how to fix
this Specific issue.
> Adam Farber W4AJF
> Cooper City, FL
>
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Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF?
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Show quoted text
On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c Bob KF8IY
On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF <adamf@...> wrote:
> Hi all, I have an issue with the display board in one of my Drake
> TR-7's and it's the board for sure because I installed the problem
> board in another TR-7 and it has the EXACT same issue: On the TR-7
> with the issue it was fine and not used for a while, turned it on and
> now the display shows 51.950 on all bands. The VFO will move it up and
> down but of course it will still be in that range on all bands but it
> does receive and transmit. I see this issue has been discussed on this
> web site but I don't see any answers?
Any help appreciated, I am hoping someone has figured out how to fix
this Specific issue.
> Adam Farber W4AJF
> Cooper City, FL
>
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Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area. 73 -Jim NU0C On Mon, 4 Mar 2024 23:07:19 -0500 "Adam W4AJF" <adamf@...> wrote: Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF?
On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c
Bob KF8IY
On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF <adamf@...> wrote:
Hi all, I have an issue with the display board in one of my Drake
TR-7's and it's the board for sure because I installed the problem
board in another TR-7 and it has the EXACT same issue: On the TR-7
with the issue it was fine and not used for a while, turned it on and
now the display shows 51.950 on all bands. The VFO will move it up and
down but of course it will still be in that range on all bands but it
does receive and transmit. I see this issue has been discussed on this
web site but I don't see any answers? Any help appreciated, I am hoping someone has figured out how to fix
this Specific issue.
Adam Farber W4AJF
Cooper City, FL
-- 73 -Jim NU0C
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No need to overthink it for a change. Check the output of that 24v regulator. 0v is no good. I know that there a few experts on here. But the radio is pretty simple.
On Tuesday, March 5, 2024 at 12:37:29 AM EST, Jim Shorney <jimnu0c@...> wrote:
Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area.
73
-Jim
NU0C
On Mon, 4 Mar 2024 23:07:19 -0500 "Adam W4AJF" < adamf@...> wrote: > Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF? > > > > On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote: > > > > ? > > I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c > > Bob KF8IY > > > > On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF < adamf@...> wrote: > > > > > > > > > Hi all, I have an issue with the display board in one of my Drake > > > TR-7's and it's the board for sure because I installed the problem > > > board in another TR-7 and it has the EXACT same issue: On the TR-7 > > > with the issue it was fine and not used for a while, turned it on and > > > now the display shows 51.950 on all bands. The VFO will move it up and > > > down but of course it will still be in that range on all bands but it > > > does receive and transmit. I see this issue has been discussed on this > > > web site but I don't see any answers? > > Any help appreciated, I am hoping someone has figured out how to fix > > this Specific issue. > > > Adam Farber W4AJF > > > Cooper City, FL > > > > > > > > > > > > > > > > > > -- 73 -Jim NU0C
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Hi Jim, thanks for chiming in. Forgive my ignorance, I am not looking at the radio right now, I assume the regulator is 3 pin, which leads do I test for the 24VDC or no 24VDC? Thanks, Adam
toggle quoted message
Show quoted text
On Mar 5, 2024, at 12:55?AM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
No need to overthink it for a change. Check the output of that 24v regulator. 0v is no good. I know that there a few experts on here. But the radio is pretty simple.
On Tuesday, March 5, 2024 at 12:37:29 AM EST, Jim Shorney <jimnu0c@...> wrote:
Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area. 73 -Jim NU0C On Mon, 4 Mar 2024 23:07:19 -0500 "Adam W4AJF" < adamf@...> wrote: > Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF? > > > > On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote: > > > > ? > > I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c > > Bob KF8IY > > > > On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF < adamf@...> wrote: > > > > > > > > > Hi all, I have an issue with the display board in one of my Drake > > > TR-7's and it's the board for sure because I installed the problem > > > board in another TR-7 and it has the EXACT same issue: On the TR-7 > > > with the issue it was fine and not used for a while, turned it on and > > > now the display shows 51.950 on all bands. The VFO will move it up and > > > down but of course it will still be in that range on all bands but it > > > does receive and transmit. I see this issue has been discussed on this > > > web site but I don't see any answers? > > Any help appreciated, I am hoping someone has figured out how to fix > > this Specific issue. > > > Adam Farber W4AJF > > > Cooper City, FL > > > > > > > > > > > > > > > > > > -- 73 -Jim NU0C
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You can measure the +24V from the bottom side of the radio at the pins of the PS board. However, if the radio is operating normally from an RF standpoint, i.e., the PLL is locked and stable in the ham band that you expect it is a pretty safe bet that the +24 is OK. My question was about SIMPLIFYING the process to narrow it down between a PLL issue and a problem strictly with the frequency counter section. 73 -Jim NU0C On Tue, 5 Mar 2024 01:05:01 -0500 "Adam W4AJF" <adamf@...> wrote: Hi Jim, thanks for chiming in. Forgive my ignorance, I am not looking at the radio right now, I assume the regulator is 3 pin, which leads do I test for the 24VDC or no 24VDC? Thanks, Adam
On Mar 5, 2024, at 12:55?AM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
No need to overthink it for a change. Check the output of that 24v regulator. 0v is no good. I know that there a few experts on here. But the radio is pretty simple.
On Tuesday, March 5, 2024 at 12:37:29 AM EST, Jim Shorney <jimnu0c@...> wrote:
Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area.
73
-Jim
NU0C
On Mon, 4 Mar 2024 23:07:19 -0500
"Adam W4AJF" <adamf@...> wrote:
Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF?
On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c
Bob KF8IY
On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF <adamf@...> wrote:
Hi all, I have an issue with the display board in one of my Drake
TR-7's and it's the board for sure because I installed the problem
board in another TR-7 and it has the EXACT same issue: On the TR-7
with the issue it was fine and not used for a while, turned it on and
now the display shows 51.950 on all bands. The VFO will move it up and
down but of course it will still be in that range on all bands but it
does receive and transmit. I see this issue has been discussed on this
web site but I don't see any answers? Any help appreciated, I am hoping someone has figured out how to fix
this Specific issue.
Adam Farber W4AJF
Cooper City, FL
--
73
-Jim
NU0C
-- 73 -Jim NU0C
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Ok Jim, Adam
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Show quoted text
On Mar 5, 2024, at 1:19?AM, Jim Shorney <jimNU0C@...> wrote:
?
You can measure the +24V from the bottom side of the radio at the pins of the PS board.
However, if the radio is operating normally from an RF standpoint, i.e., the PLL is locked and stable in the ham band that you expect it is a pretty safe bet that the +24 is OK.
My question was about SIMPLIFYING the process to narrow it down between a PLL issue and a problem strictly with the frequency counter section.
73
-Jim
NU0C
On Tue, 5 Mar 2024 01:05:01 -0500
"Adam W4AJF" <adamf@...> wrote:
Hi Jim, thanks for chiming in. Forgive my ignorance, I am not looking at the radio right now, I assume the regulator is 3 pin, which leads do I test for the 24VDC or no 24VDC? Thanks, Adam
On Mar 5, 2024, at 12:55?AM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
No need to overthink it for a change. Check the output of that 24v regulator. 0v is no good. I know that there a few experts on here. But the radio is pretty simple.
On Tuesday, March 5, 2024 at 12:37:29 AM EST, Jim Shorney <jimnu0c@...> wrote:
Is the radio operating normally otherwise? In the correct band and stable? That will help localize the problem area.
73
-Jim
NU0C
On Mon, 4 Mar 2024 23:07:19 -0500
"Adam W4AJF" <adamf@...> wrote:
Thanks Bob, I am going to resolder the pins first, if no luck I¡¯ll replace that part. Thanks! Adam W4AJF
On Mar 4, 2024, at 7:49?PM, BOB DOSTALL via groups.io <bdostall@...> wrote:
?
I had that issue recently on a radio in the shop for repair. It was the 24v regulator U2103. M78L24c
Bob KF8IY
On Monday, March 4, 2024 at 03:14:08 PM EST, Adam W4AJF <adamf@...> wrote:
Hi all, I have an issue with the display board in one of my Drake
TR-7's and it's the board for sure because I installed the problem
board in another TR-7 and it has the EXACT same issue: On the TR-7
with the issue it was fine and not used for a while, turned it on and
now the display shows 51.950 on all bands. The VFO will move it up and
down but of course it will still be in that range on all bands but it
does receive and transmit. I see this issue has been discussed on this
web site but I don't see any answers? Any help appreciated, I am hoping someone has figured out how to fix
this Specific issue.
Adam Farber W4AJF
Cooper City, FL
--
73
-Jim
NU0C
--
73
-Jim
NU0C
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Jim Shorney