Re: TR7 low band TX oscillation
This is a thing. Unfortunately not one of Drake's best ideas. I have seen at least one case where the owner added a toggle switch to the front of the PS7 and eliminated the mains feed through the
By
Jim Shorney
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#74753
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Re: TR7 low band TX oscillation
All ground connections should be checked. This includes screws, straps, springy copper, and soldered shields. The card cage covers need to be on and secured with ALL screws snug but not over tight or
By
Jim Shorney
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#74752
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Re: Very Nice RV4C Arrived and is now working
...and, unlike the Call Book...
Pabst Brewing Company, now headquartered in Los Angeles, continues to produce Schlitz beer, Old Milwaukee, and four Schlitz malt liquors¡ªSchlitz Red Bull, Schlitz
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Joseph K4JNG
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#74751
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Re: Very Nice RV4C Arrived and is now working
It says Radio Amateur Call Book.
By
Clint VE3CMQ
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#74750
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Re: Very Nice RV4C Arrived and is now working
n4buq writes:
The manspreading just adds that appropriate touch of je ne sais quoi.
Is that QST or Playboy that he's reading? The title has been tastefully
pixellated away from tender
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Lyndon VE7TFX <lyndon@...>
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#74749
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Re: Very Nice RV4C Arrived and is now working
Didn¡¯t look to see I was replying on the Board. Yes¡a non-ham friend asked me if I put on a dress shirt and tie to talk on the radio¡
The XYL says, ¡°Go get your own beer and be thankful
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Joseph K4JNG
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#74748
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Re: Very Nice RV4C Arrived and is now working
"Oh, honey - I see you have on your white shirt and necktie. You must be going down to talk to other people besides me on your ham radio. Let me bring you a beer."
Barry - N4BUQ
By
n4buq
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#74747
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Re: Very Nice RV4C Arrived and is now working
Peter:
No worries. It¡¯s all good. As it is, it looks as if I am going to be searching quite a while for that second RV75. Anyway, the R7 still needs to go to the shop to get the
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Joseph K4JNG
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#74746
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Re: Very Nice RV4C Arrived and is now working
Joseph:
Package will go out today....got delayed yesterday as my truck was
unexpectedly in the shop all day...read $$$$!
The desk in Ray's ad is a Design Industries "Diplomat" model - see pic
By
VE7PS
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#74745
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Re: TR7 low band TX oscillation
Several months ago my TR7 started low band self- oscillations during antenna tuning and tripped the PS7. Found the problem was due to loose chassis screws over the years. I checked every single
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Kam VA6CA
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#74744
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Re: Very Nice RV4C Arrived and is now working
Thanks, Peter, for a great memory. For whatever reason, I always found the transverters to be the coolest things. Today, I am still searching for a desk with a sloped section at the back. Any ideas
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Joseph K4JNG
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#74743
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Re: TR7 low band TX oscillation
Guten Tag, Dieter:
By ¡°relay box¡±, do you mean a remote power switch?
Danke Ihnen und 73,
joe
joseph n. graif
k4jng
Sent: Tuesday, November 28, 2023 7:55 AM
To:
By
Joseph K4JNG
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#74742
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Re: TR7 low band TX oscillation
Hi Patrick,
The culprit is the PS7 connector which brings mains voltage in your radio including hum you won¡¯t get rid of.
So it is not the PSU itself that brings the hum in your radio.
I use a
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Dieter Horst
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#74741
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Re: Very Nice RV4C Arrived and is now working
Please excuse newbie question, but what is a fiberglas pen ?
Tnx & 73, Jim W4QE
(TR7 awaiting time to get into it...)
By
Jim W4QE
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#74740
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Re: TR7 low band TX oscillation
Hi Jim,
After a lot of tests, PSU swaps, etc... I came to the conclusion that this TR7 is *VERY VERY* sensitive to any noise, AC spurs, hum that are present on the 13,5V supply voltage.
Even is
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Patrick TK5EP
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#74739
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Re: Very Nice RV4C Arrived and is now working
Chuck:
I think a lot of us "of that vintage" remember the dreams we had of owning
a station like Ray's back in those days. That AES ad certainly affected me
for a very long time....still does
When
By
VE7PS
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#74738
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Re: S meter sticks
If you can get the meter case apart, you'll find a small screw that tensions the meter movement bearing.? Back that out 1/8 of a turn, tap the needle and see if that freed it up.? That worked 100%
By
Chuck Rippel - K8HU and ex - NMN
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#74737
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Very Nice RV4C Arrived and is now working
Picked up a very nice, cosmetically near-perfect RV4-C to go with the TR4CW-RIT; been wanting a nice one.? I expect it was cheap because it was unstable when tuned.
Easy fix.? Shoot the MODE switch
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Chuck Rippel - K8HU and ex - NMN
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#74736
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Re: S meter sticks
Dryer sheets work great on static. a little rub on the meter and no more static
Marty
KL7AM
By
KL7AM
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#74735
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Re: S meter sticks
It could be a small bit of debris stuck inside the mechanism or it could be a bit of static buildup on the meter case. Static will usually dissipate after a while.
73
-Jim
NU0C
"K6OXN Bob"
By
Jim Shorney
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#74734
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