Re: TR-7 missing digit's on display
The DR7 is such a fragile board, a true PITA to work on, I would leave it alone if it works. Those two capacitors are only there to prevent oscillation of the regulator and serve no function in offering the correct voltages on either end of the regulator, unless shorted of course.?
A working DR7 is a DR7 best left alone!
Gary
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On Jan 23, 2024, at 4:15?PM, Steven KE2AXS <sosborne8270@...> wrote:
I believe those Rubycon caps are originals. I have seen Richy and Rubcon caps in a lot of Drake gear. Thats is what was in my TR7 when I replaced them 5 years ago. Even back then they had considerable leakage. I see some 1979 date codes on your chips. ~44 years for an electrolytic cap is probably pushing your luck.
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Re: Outer Coaxial Jacket Removal for a Long Length
There is a metal tool used for stripping Romex type wire that ma work well for you. Kind of a narrow clamshell looking thing that is all metal and very reasonably priced Search this on Amazon Gardner Bender CR-100 4-Inch Romex Cable Ripper, Metallic
From: "Barry" <n4buq@...> To: "DRAKE-RADIO" < [email protected]> Sent: Tuesday, January 23, 2024 4:31:35 PM Subject: Re: [DRAKE-RADIO] Outer Coaxial Jacket Removal for a Long Length
On the page Warren posted, this tool showed up:
Looks like it might work? 73, Barry - N4BUQ
From: "NI5L" <ni5l@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, January 23, 2024 7:24:32 PM
Subject: Re: [DRAKE-RADIO] Outer Coaxial Jacket Removal for a Long Length
Something like this would work.
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73 de NI5L
Warren
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Re: Outer Coaxial Jacket Removal for a Long Length
On the page Warren posted, this tool showed up:
Looks like it might work?
73, Barry - N4BUQ
From: "NI5L" <ni5l@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, January 23, 2024 7:24:32 PM
Subject: Re: [DRAKE-RADIO] Outer Coaxial Jacket Removal for a Long Length
Something like this would work.
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73 de NI5L
Warren
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Re: Outer Coaxial Jacket Removal for a Long Length
Something like this would work.
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73 de NI5L
Warren
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Re: Outer Coaxial Jacket Removal for a Long Length
HI Mike¡. ? Contact your closest electrical contractor and talk to one? of their technicians¡they have a tool, that is adjustable to remove wire jackets from all sizes of wires. Give him/her a ?pack of beer or soda and he would probably strip a 500 foot roll of coax for you!? J? (Well..maybe no-o-t-t-t that much¡but¡.!!) ? Joe ¨C W7RKN ? From: [email protected] [mailto:[email protected]] On Behalf Of Michael Smith via groups.io
Subject: [DRAKE-RADIO] Outer Coaxial Jacket Removal for a Long Length ? I would like to put up a vertical sleeved 1/2 wave dipole, using Belden 8279, 75 ohm coax. ?I have been pondering a good way to remove approximately 11 contiguous feet of the outer jacket, of course without nicking the copper shield, but haven¡¯t come to any ideas, that I sense will work well. ?The Wireman and DXE could offer no tools or procedure. ?A sharp blade needs to be run along the length of the coax, while maintaining a precise depth. ?The coax OD is 0.22 inches and the outer jacket wall thickness is 0.074 inches, polyethylene. ?Perhaps a small V-block could be used to stabilize the round coax in position, while holding a knife blade pressed on the outer jacket and pushing down on the cable at the same time to keep the coax in the V, and pulling the coax through; I would not cut completely through the jacket when
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Re: TR-7 missing digit's on display
I believe those Rubycon caps are originals. I have seen Richy and Rubcon caps in a lot of Drake gear. Thats is what was in my TR7 when I replaced them 5 years ago. Even back then they had considerable leakage. I see some 1979 date codes on your chips. ~44 years for an electrolytic cap is probably pushing your luck.
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Outer Coaxial Jacket Removal for a Long Length
I would like to put up a vertical sleeved 1/2 wave dipole, using Belden 8279, 75 ohm coax. ?I have been pondering a good way to remove approximately 11 contiguous feet of the outer jacket, of course without nicking the copper shield, but haven¡¯t come to any ideas, that I sense will work well. ?The Wireman and DXE could offer no tools or procedure. ?A sharp blade needs to be run along the length of the coax, while maintaining a precise depth. ?The coax OD is 0.22 inches and the outer jacket wall thickness is 0.074 inches, polyethylene. ?Perhaps a small V-block could be used to stabilize the round coax in position, while holding a knife blade pressed on the outer jacket and pushing down on the cable at the same time to keep the coax in the V, and pulling the coax through; I would not cut completely through the jacket when doing this, but after cutting the entire length, tear the outer jack off. I think I could do this with two hands. ?Any ideas?
Thank you.
73, Michael Smith, N4KZO
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Re: TR-7 missing digit's on display
Well after goofing around with the voltage regulators connectors I now have display again. Do these yellow electrolytics look newer or are they original??
Not sure why the connectors didn't clean yesterday when I pulled out the board, but happy it's working. Now back to the 75A4 that someone rewired V5.?
Thanks,? Eric? K8cca?
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Re: Misc parts at NC0B's QTH
Rob
I would like to buy the 4000 AM filter.? I have an address in Fort Recovery, Ohio.
Nigel Patterson
On Tue, Jan 23, 2024 at 7:40?PM Rob Sherwood < rob@...> wrote:
All the miscellaneous items have been shipped USPS Priority, nominally arriving on Friday except for one shipment to BC, Canada.? Maybe 3 weeks for that one.
Items still looking for a new home listed below.
Rob, NC0B
?
?
Here are some filters and items available.
$75.00 plus $10.00 shipping unless otherwise? noted.
?
PayPal to rob@...???? (Not this email address)
?
Consider it house cleaning on my part.
?
Two 500 Hz Piezo Tech
One 4000 Hz Piezo Tech AM filter
One 125 Hz INRAD
1000 Hz for TR-7 Drake
500 Hz OEM? $40
2.1 kHz Fox Tango $40
?
Misc.
Two parts R-4Cs?
?
Rob, NC0B
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Re: TR-7 missing digit's on display
When you say "almost" it sounds like the displays are on and correct but DIM. If cleaning the connectors doesn't fix the issue, note that there is a 7805 regulator that only feeds the displays. It has the usual 10uf electrolytic cap on its output and probably one on its input. Might be time to break out ye old VM and check to see if you have 5 volts on the output of that regulator. I suspect those electrolytic caps may have finally given up.
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Re: Misc parts at NC0B's QTH
All the miscellaneous items have been shipped USPS Priority, nominally arriving on Friday except for one shipment to BC, Canada.? Maybe 3 weeks for that one.
Items still looking for a new home listed below.
Rob, NC0B
?
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From: [email protected] [mailto:[email protected]]
On Behalf Of Rob Sherwood
Sent: Wednesday, January 17, 2024 9:09 PM
To: [email protected]
Subject: [DRAKE-RADIO] Misc parts at NC0B's QTH
?
Here are some filters and items available.
$75.00 plus $10.00 shipping unless otherwise? noted.
?
PayPal to rob@...???? (Not this email address)
?
Consider it house cleaning on my part.
?
Two 500 Hz Piezo Tech
One 4000 Hz Piezo Tech AM filter
One 125 Hz INRAD
1000 Hz for TR-7 Drake
500 Hz OEM? $40
2.1 kHz Fox Tango $40
?
Misc.
Two parts R-4Cs?
?
Rob, NC0B
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Re: TR-7 missing digit's on display
Check the connectors on the top of the board
From: "K8CCA" <echapm4@...> To: "DRAKE-RADIO" < [email protected]> Sent: Tuesday, January 23, 2024 3:00:50 AM Subject: [DRAKE-RADIO] TR-7 missing digit's on display
Hey guys, went to use my TR-7 last night and found that the digital display was almost completely out, all the digits except the most right where gone.? It worked fine last time I used it, perhaps in September.? I pulled the rig out of the lineup and removed the display board, thinking cleaning the pins would fix it.? Put it back in and still the same.? I guess I should have pulled all the boards?? Am I on the right path or is there some other issue? Any and all advice appreciated.
Thanks,
Eric
K8CCA
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Drake FS4 RF tune decal for R4 series receivers
When the FS4 is attached to a Drake Receiver , Drake supplied a decal to adhere to the RF tuning knob to help find the proper peak areas quickly. I am looking for a decal, copy or excellent image I can have a decal made. ?
I appreciate any help you can provide. ?
Ray. N3AQ
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TR-7 missing digit's on display
Hey guys, went to use my TR-7 last night and found that the digital display was almost completely out, all the digits except the most right where gone.? It worked fine last time I used it, perhaps in September.? I pulled the rig out of the lineup and removed the display board, thinking cleaning the pins would fix it.? Put it back in and still the same.? I guess I should have pulled all the boards?? Am I on the right path or is there some other issue? Any and all advice appreciated.
Thanks,
Eric
K8CCA
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Re: Drake W4 wattmeter woes...
Please note that #75697 and #75696 was sent some days ago, but just turned up today.
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best regards,
Glenn, OZ1HFT
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Re: Drake W4 wattmeter part three
Mike
I placed 2 each 1N295's in the mail to you this AM. I think these are the spare 2 I bought for my W4 when I was having problems.? Enjoy
73? Bob
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Re: Drake W4 wattmeter part three
I'm fortunate in that this set seems to be unmolested AND has BOTH 500 Hz CW filters. Not bad for $80 at NEARfest a couple of years ago!
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with Proton Mail secure email.
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On Monday, January 22nd, 2024 at 7:20 PM, jerry-KF6VB <jerry@...> wrote: On 2024-01-22 14:36, Steve Wedge, W1ES/4 via groups.io wrote:
Yeah, we all have "those projects". I'm finally tearing into a
TS-830S
*** I loved my TS-830S. Best radio I'd ever had. My only problem
with it
was the crappy circuit boards. They were not very tolerant of rework.
- Jerry, KF6VB
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I need to get some of my volume cut down to a more reasonable level.
I have one C Line cabinet.? This fits either the T-4XC or R-4C, as Drake moved all side jacks and controls off of the sides -- enabling them to use just one set of cabinet bottoms.? No dents, some adhesives evident in various places and it looks like it had a minor respray.? No feet.? $30
R-4B cabinet.? Bottom has some denting around where the feet were and there are some marks/scrapes, here and there.? Not bad and I've seen much worse. Silkscreen on the side is good.? No feet.? $30
Prices are plus shipping and I use Pirate Ship for either USPS or UPS (your choice)? Either of these are very restorable.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
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Re: Drake W4 wattmeter woes...
Hi Mike
Search for 1N295 here:
https://www.nteinc.com/search.php
Found NTE109.
Datasheet NTE109:
https://www.nteinc.com/specs/100to199/pdf/nte109.pdf
How to find NTE distributors:
https://www.nteinc.com/2-ways-to-purchase.php
You can a few maximum ratings on 1N295 here:
https://english.electronica-pt.com/components-cross-reference?ref=1n295
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best regards,
Glenn, OZ1HFT
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Re: Drake W4 wattmeter woes... 1N295...
Hi Mike
Goto:
Search for 1N295 - NTE109 can replace 1N295.
NTE109 datasheet:
https://www.nteinc.com/specs/100to199/pdf/nte109.pdf
How to purchase:
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best regards,
Glenn, OZ1HFT
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Warren NI5L
K8CCA
Rob Sherwood