Re: TR-7 BFO 8050 Khz (8.050 Mhz) Xtal Needed
Please define "dodgy". What exactly is it doing? Have you ruled out other components, soldering, tin whiskers, etc. ? You can often find the boards on eBay but not cheap. Better to repair if you can. 73 -Jim NU0C On Sat, 27 Jan 2024 13:51:08 -0800 "Dave W1VSX via groups.io" <davetumey@...> wrote: I have a TR-7 with a dodgy BFO Xtal on the PBT/REF board does anyone have a spare Xtal, or in the alternative a spare PBT/REF board, they are willing to sell?
Oh, and sorry if I screwed this up, it is my first Drake post? - if I did something wrong, corrective suggestions are welcome - if you want to yell at me, I already have my XYL doing a great job with that.
Thank you.
73
--dave
W1VSX
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Re: RV-4 and TR-4 Signal Issue
I should clarify. When transmitting and the RV-4 is off, the signal is sent on either the TR-4 frequency or the RV-4 frequency. ?I discovered this when calling CQ on CW and checking out the RBN one night. ?
Has anyone else had a problem like this?
Thanks
Cody N4AAT
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Re: TR-7 BFO 8050 Khz (8.050 Mhz) Xtal Needed
My bad, you did say it was on the PBT/Ref board. I do not have one of these unless I decide to part out my R7.
Gary
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On Jan 27, 2024, at 10:00?PM, Gary Follett <xntrick1948@...> wrote:
What board holds that crystal - I don¡¯t recall. I have some spare TR7 boards and may have the crystal.
Gary
W0DVN On Jan 27, 2024, at 3:51?PM, Dave W1VSX via groups.io <davetumey@...> wrote:
I have a TR-7 with a dodgy BFO Xtal on the PBT/REF board does anyone have a spare Xtal, or in the alternative a spare PBT/REF board, they are willing to sell?
Oh, and sorry if I screwed this up, it is my first Drake post? - if I did something wrong, corrective suggestions are welcome - if you want to yell at me, I already have my XYL doing a great job with that.
Thank you.
73
--dave
W1VSX
|
Re: TR-7 BFO 8050 Khz (8.050 Mhz) Xtal Needed
What board holds that crystal - I don¡¯t recall. I have some spare TR7 boards and may have the crystal.
Gary
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On Jan 27, 2024, at 3:51?PM, Dave W1VSX via groups.io <davetumey@...> wrote:
I have a TR-7 with a dodgy BFO Xtal on the PBT/REF board does anyone have a spare Xtal, or in the alternative a spare PBT/REF board, they are willing to sell?
Oh, and sorry if I screwed this up, it is my first Drake post? - if I did something wrong, corrective suggestions are welcome - if you want to yell at me, I already have my XYL doing a great job with that.
Thank you.
73
--dave
W1VSX
|
I think that shaft is 1/8 inch diameter brass rod. in Ten Tec PTO¡¯s. I have made a few of them from brass and they worked well. I use an old Myford wood lathe, which works well with brass and Aluminum, to make these.
This part is so simple, with only one important machined surface, the bearing trench), you could clamp your hand drill into a vise, chuck up a piece of that 1/8 inch brass and make a proper bearing groove, using a hand held small rat tail file, power file the groove. Then you cut both ends to proper length with a hack saw. If you want to pretty up the ends (not required) you can put the piece back into the drill and power file with a mill file on both ends.
Gary
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On Jan 27, 2024, at 6:29?PM, Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote:
And, as importantly, whether or not the shaft is worn down from many years of use. ?There is a "trick" on Ron's website that uses a relocation of the central shaft to get the ball bearings off of the worn spot. ?It involves getting some spacing material inside the coupler to force the shaft to ride in a new location.Alternately, one could re-create a shaft, with the appropriate machine tools and hardening procedures...Steve Wedge, W1ES/4Time flies like an arrow.? Fruit flies like a banana.Sent with Proton Mail secure email.On Saturday, January 27th, 2024 at 3:56 PM, wb6ogd <garywinblad@...> wrote:Michael,
Vasoline works for me.
So does light oil (sewing machine type oil).
What is critical is the "squeeze" of the tabs around the edge.
73,
Gary
WB6OGD
On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io blumu@... wrote:
How does Vaseline perform? (Maybe only known in the UK.)
My R4-B is ok at present, but...
Michael 2E0IHW
On 27/01/2024 15:17, Paul Christensen wrote:
We all have our opinions but consider using only newer synthetic
grease. For mechanical PTO and VFO rebuilds, I¡¯m using Mobile1 and
Valvoline SynPower brands. Petroleum axle and lithium-based grease has
a short lubrication lifetime.
Likewise, I strongly suggest staying away from pure silicone and
Teflon-based grease like TriFlow. I nearly ruined a Drake 1A VFO
gearbox after a rebuild with TriFlow. Teflon and silicone lose its
ability to lubricate in conditions of angular pressure. After spending
a day removing the TriFlow grease, the assembly was re-packed with
Mobile1 (Red) synthetic grease and the assembly moves as smoothly today
as it did after the rebuild ten years ago.
Paul, W9AC
|
What a great resource for Drake lovers!! I¡¯m overwhelmed by the response. I¡¯m away from the receiver until mid next week but as soon as I get back to it and determine what frequency Drake uses for the bands I¡¯m interested in, I¡¯ll PM all that responded.
This little receiver seems to work really well even without the noise blanker which is apparently rare. My receiver is fairly clean and works well on all the frequencies it has crystals. I may be pulling some of the crystals I don¡¯t have plans to use to make room for others. If I do, I¡¯ll post those for others that may be interested.
Thanks,
Tom N5AMA
|
And, as importantly, whether or not the shaft is worn down from many years of use. There is a "trick" on Ron's website that uses a relocation of the central shaft to get the ball bearings off of the worn spot. It involves getting some spacing material inside the coupler to force the shaft to ride in a new location.
Alternately, one could re-create a shaft, with the appropriate machine tools and hardening procedures...
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 Saturday, January 27th, 2024 at 3:56 PM, wb6ogd <garywinblad@...> wrote: Michael,
Vasoline works for me.
So does light oil (sewing machine type oil).
What is critical is the "squeeze" of the tabs around the edge.
73,
Gary
WB6OGD
On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io blumu@... wrote:
How does Vaseline perform? (Maybe only known in the UK.)
My R4-B is ok at present, but...
Michael 2E0IHW
On 27/01/2024 15:17, Paul Christensen wrote:
We all have our opinions but consider using only newer synthetic
grease. For mechanical PTO and VFO rebuilds, I¡¯m using Mobile1 and
Valvoline SynPower brands. Petroleum axle and lithium-based grease has
a short lubrication lifetime.
Likewise, I strongly suggest staying away from pure silicone and
Teflon-based grease like TriFlow. I nearly ruined a Drake 1A VFO
gearbox after a rebuild with TriFlow. Teflon and silicone lose its
ability to lubricate in conditions of angular pressure. After spending
a day removing the TriFlow grease, the assembly was re-packed with
Mobile1 (Red) synthetic grease and the assembly moves as smoothly today
as it did after the rebuild ten years ago.
Paul, W9AC
|
Re: OT: Searching for the Name/Author of an Old Beginning Electronics Book
I have a few methods for finding such things:
1) Ebay obviously, but check the box "completed auctions" on the left-hand side.? That way you will see older auctions as well.? There is also a check box for "worldwide".? You can also visit foreign Ebay sites, such as ebay.com.au (australia), ebay.com.it, ebay.com.de ....etc? Foreign ebay items will not appear on the US site unless they ship to the US.
2) Do a google search such as beginning electronics book images.? Or maybe throw in the word vintage also.? There will be pages and pages of images.? Sometimes you will see an image of the item you are looking for.? And hopefully you can see the author.? This has also worked for me when I was looking for schematics.
3) Different search engines give different results.? Try duckduckgo, yahoo, bing, hotbot, etc.
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Re: [TenTec] Replacement of 580 Delta PTO lubricant
I used that to re-lube my Argonaut 509 and to lube the bandswitch on my SB-200 as the amp following my 32S-1. Absolutely smooth on all.
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On Jan 27, 2024, at 4:43?PM, Jim Shorney <jimNU0C@...> wrote:
?
I dunno, the TriFlow that I use is a bicycle bearing grease.
The R390 guys like Phil Woods bicycle grease. I have a tube of that as well.
73
-Jim
NU0C
On Sat, 27 Jan 2024 15:45:01 -0600
"Gary Follett" <xntrick1948@...> wrote:
I am fortunate to have an ultrasonic cleaner so, once I remove a PTO from a radio, I can sonicate it to get the old grease out and then flow a lubricant in. I might not chose Tri Flow as it is pretty low in viscosity and not intended for durable use applications but I¡¯ll see what I learn next time I need to do one of these.
This would also work well with Collins PTO¡¯s.
|
Aside from all that it has a relatively low melting point. 73 -Jim NU0C On Sat, 27 Jan 2024 15:46:46 -0600 "Gary Follett" <xntrick1948@...> wrote: This is why I never use Vaseline as a lubricant for anything but living things:
Conents: Water (aqua), Glycerin, Stearic Acid, Isopropyl Palmitate, Glycol Stearate, Peg-100 Stearate, Mineral Oil, Dimethicone, Petrolatum, Glyceryl Stearate, Phenoxyethanol, Cetyl Alcohol, Methylparaben, Acrylates/c10-30 Alkyl Acrylate Crosspolymer, Triethanolamine, Propylparaben, Disodium EDTA, Stearamide Amp, Cedrol, Dihydroxypropyltrimonium Chloride and Hydroxyethyl Urea.
Gary
W0DVN
On Jan 27, 2024, at 2:56?PM, wb6ogd <garywinblad@...> wrote:
Michael,
Vasoline works for me.
So does light oil (sewing machine type oil).
What is critical is the "squeeze" of the tabs around the edge.
73,
Gary
WB6OGD
On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io <blumu@...> wrote:
How does Vaseline perform? (Maybe only known in the UK.)
My R4-B is ok at present, but...
Michael 2E0IHW
On 27/01/2024 15:17, Paul Christensen wrote:
We all have our opinions but consider using only newer synthetic
grease. For mechanical PTO and VFO rebuilds, I¡¯m using Mobile1 and
Valvoline SynPower brands. Petroleum axle and lithium-based grease has
a short lubrication lifetime.
Likewise, I strongly suggest staying away from pure silicone and
Teflon-based grease like TriFlow. I nearly ruined a Drake 1A VFO
gearbox after a rebuild with TriFlow. Teflon and silicone lose its
ability to lubricate in conditions of angular pressure. After spending
a day removing the TriFlow grease, the assembly was re-packed with
Mobile1 (Red) synthetic grease and the assembly moves as smoothly today
as it did after the rebuild ten years ago.
Paul, W9AC
-- 73 -Jim NU0C
|
Re: [TenTec] Replacement of 580 Delta PTO lubricant
I dunno, the TriFlow that I use is a bicycle bearing grease. The R390 guys like Phil Woods bicycle grease. I have a tube of that as well. 73 -Jim NU0C On Sat, 27 Jan 2024 15:45:01 -0600 "Gary Follett" <xntrick1948@...> wrote: I am fortunate to have an ultrasonic cleaner so, once I remove a PTO from a radio, I can sonicate it to get the old grease out and then flow a lubricant in. I might not chose Tri Flow as it is pretty low in viscosity and not intended for durable use applications but I¡¯ll see what I learn next time I need to do one of these.
This would also work well with Collins PTO¡¯s.
|
TR-7 BFO 8050 Khz (8.050 Mhz) Xtal Needed
I have a TR-7 with a dodgy BFO Xtal on the PBT/REF board does anyone have a spare Xtal, or in the alternative a spare PBT/REF board, they are willing to sell?
Oh, and sorry if I screwed this up, it is my first Drake post? - if I did something wrong, corrective suggestions are welcome - if you want to yell at me, I already have my XYL doing a great job with that.
Thank you.
73
--dave
W1VSX
|
This is why I never use Vaseline as a lubricant for anything but living things:
Conents: Water (aqua), Glycerin, Stearic Acid, Isopropyl Palmitate, Glycol Stearate, Peg-100 Stearate, Mineral Oil, Dimethicone, Petrolatum, Glyceryl Stearate, Phenoxyethanol, Cetyl Alcohol, Methylparaben, Acrylates/c10-30 Alkyl Acrylate Crosspolymer, Triethanolamine, Propylparaben, Disodium EDTA, Stearamide Amp, Cedrol, Dihydroxypropyltrimonium Chloride and Hydroxyethyl Urea.
Gary
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On Jan 27, 2024, at 2:56?PM, wb6ogd <garywinblad@...> wrote:
Michael, Vasoline works for me. So does light oil (sewing machine type oil). What is critical is the "squeeze" of the tabs around the edge. 73, Gary WB6OGD On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io <blumu@...> wrote:
How does Vaseline perform? ?(Maybe only known in the UK.)
My R4-B is ok at present, but...
Michael 2E0IHW
On 27/01/2024 15:17, Paul Christensen wrote:
We all have our opinions but consider using only newer synthetic
grease.? For mechanical PTO and VFO rebuilds, I¡¯m using Mobile1 and
Valvoline SynPower brands.? Petroleum axle and lithium-based grease has
a short lubrication lifetime.
Likewise, I strongly suggest staying away from pure silicone and
Teflon-based grease like TriFlow.? I nearly ruined a Drake 1A VFO
gearbox after a rebuild with TriFlow. Teflon and silicone lose its
ability to lubricate in conditions of angular pressure.? After spending
a day removing the TriFlow grease, the assembly was re-packed with
Mobile1 (Red) synthetic grease and the assembly moves as smoothly today
as it did after the rebuild ten years ago.
Paul, W9AC
|
Re: [TenTec] Replacement of 580 Delta PTO lubricant
Your method is really quite ingenious. I have done complete rebuild on several of these and you are right, no fun at a ll.
I am fortunate to have an ultrasonic cleaner so, once I remove a PTO from a radio, I can sonicate it to get the old grease out and then flow a lubricant in. I might not chose Tri Flow as it is pretty low in viscosity and not intended for durable use applications but I¡¯ll see what I learn next time I need to do one of these.
This would also work well with Collins PTO¡¯s.
Sonicating in white gas would be more efficient at removing the old grease, then sonicating in denatured alcohol to clean away the white gas residues (outdoors, preferably).
Some grades might be soluble in a solvent, which would be really great as the solvent would evaporate leaving a decently viscous lubricant behind.
I had one idea I have yet to try since I do not have any needy radios handy but, if one could get a small vacuum pump, one could put a hose over concentric shafts and pull solvents through the parts and then suck low viscosity lubricant in afterwards.
Gary
W0DVN
PS: For the Drake guys, this would work really well with the preselector caps in the Drake 2A and 2B receivers without even needing to remove them from the radios (a treacherous task, far worse than anything Ten Tec ever dreamed up).
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On Jan 27, 2024, at 3:16?PM, Winston Jones <jones_winston@...> wrote:
My advice is based upon past reading of a Ten-Tec thread on freeing up stuck PTOs in Ten-Tec radios.
You do not have to remove the PTO from the radio.
Sometime back, I used this technique on an old Ten-Tec Omni-D I bought with a tight PTO.
First, forget about rebuilding the PTO. Ten-Tec used to sell a rebuild kit which included new bearings, springs, grease, etc. Those have not been available for many years. Anyway, the process was a nightmare, even with the parts kit.
Here¡¯s how I fixed my PTO:
First, remove the knob and flange, per manual instructions.
Use a hypodermic needle to squirt denatured alcohol into the bearing housing on the tuning shaft. Do not use isopropyl alcohol, as it has water in it.
Rotate the shaft from end to end many times to remove the old grease.
Then spray Tri-Flow lubricant into the bearings, and again turn the shaft many times from end to end. It may quite a while, but eventually you will feel the tuning begin to loosen up.
The PTO I fixed is still working well after two years.
I¡¯ve read where many have successfully used this technique.
On Jan 27, 2024, at 2:46?PM, Jack, VA4JP/K0JP <va4jp@...> wrote:
?A new topic? I have searched through many possible sources for an answer and know it is not but I will ask in relation to my specific situation.
I recently purchased a 580 Delta that is in very nice condition, however the seller did not fully disclose an issue with the PTO. The rig functions as it should in all respects save for the hard tuning of the PTO. I have seen it described in a number of ways but I think "like pushing a marble through molasses" is the best. Rotating the shaft has a gummy feel to it and certainly causes me to suspect aging lubricant as the cause. In my search for a definitive answer I found only one mention about replacing the grease with the admonition that it CANNOT be done independent of the PTO rebuild. Is that still the consensus of Ten Tec experts?
This would be a problem for me since I know the rebuild kits have not been available for very long time plus the fact I can no longer do some of the very fine assembly work that was routine for me a lifetime ago. If the old lubricant cannot be cleaned out and replaced with fresh then I will likely have to offer the Delta for sale. That's entirely because I am primarily a CW operator and the difficult tuning, along with a tiny amount of backlash, presents problems in the CW filter bandwidth.
Does anyone have any additional wisdom for me or is "nope, can't be done without a rebuild" the final answer?
Thanks and 73,
Jack, VA4JP/K0JP
Steinbach, MB and Karlstad, MN
|
Gary,
Thanks for that reassurance!
I'll keep some on the shelf ...
Michael 2E0IHW
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On 27/01/2024 20:56, wb6ogd wrote: Michael,
Vasoline works for me.
So does light oil (sewing machine type oil).
What is critical is the "squeeze" of the tabs around the edge. On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io <blumu@...> wrote:
How does Vaseline perform? (Maybe only known in the UK.)
My R4-B is ok at present, but...
|
Michael,
Vasoline works for me.
So does light oil (sewing machine type oil).
What is critical is the "squeeze" of the tabs around the edge.
73,
Gary
WB6OGD
toggle quoted message
Show quoted text
On 01/27/2024 11:20 AM PST Michael.2E0IHW via groups.io <blumu@...> wrote:
How does Vaseline perform? (Maybe only known in the UK.)
My R4-B is ok at present, but...
Michael 2E0IHW
On 27/01/2024 15:17, Paul Christensen wrote:
We all have our opinions but consider using only newer synthetic
grease.? For mechanical PTO and VFO rebuilds, I¡¯m using Mobile1 and
Valvoline SynPower brands.? Petroleum axle and lithium-based grease has
a short lubrication lifetime.
Likewise, I strongly suggest staying away from pure silicone and
Teflon-based grease like TriFlow.? I nearly ruined a Drake 1A VFO
gearbox after a rebuild with TriFlow. Teflon and silicone lose its
ability to lubricate in conditions of angular pressure.? After spending
a day removing the TriFlow grease, the assembly was re-packed with
Mobile1 (Red) synthetic grease and the assembly moves as smoothly today
as it did after the rebuild ten years ago.
Paul, W9AC
|
No, they are smaller and slightly different? frequency. 73, Gary? WB6OGD
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On Jan 27, 2024, at 10:27?AM, Rick W4XA <myr748@...> wrote:
?Does the SPR-4 use the "same" crystals as the other Drake (R-4x, 2-x)? receivers?
I think "AF4K" crystals has them for all the Drakes.
Cheers,
Rick
--
73/Rick
W4XA
*Every post is created using Linux
|
OT: Searching for the Name/Author of an Old Beginning Electronics Book
Hi All. I am in a quest to find an Old Beginning Electronics book that I used to read. I found said book at a wonderful LA County Library back in early/middle 80's (I checked that sucker out more than once).
As noted, the book was a beginning electronics book. It was published in the middle 1960's and had theory and practical projects you built. Started from the basics of electricity/electronics and went from there up to a simple transmitter project using transistors.
The one thing that made this book notable and identifiable in my brain was that the student made their own variable capacitor out of two 4" boards, aluminum foil, wax paper and some bolts. I constructed the crystal radio project in the book using this variable capacitor. I still have the variable cap and coil I wound using wire and a toilet paper roll. The variable capacitor picture is attached.
Would anyone out there remember this book/name/author?
73, Gordon KJ6IKT
|
RV-4 and TR-4 Signal Issue
Hello all,
I¡¯m having issue with the RV-4 when using it with my TR-4. In the off position, I can still hear the signals that the RV-4 is tuned to even though it¡¯s off. ?Also when I transmit CW, it seems to switch back and forth between transmitting on the TR-4 frequency and the RV-4 frequency. ?
I¡¯m not much of a technician, but I can do what needs to be done on it if I know what to do and I would love to learn more about them. I¡¯ve done some basic restoration on other tube rigs with success. Nothin fancy, though. ?
Thanks!
Cody N4AAT
|
After adding the FS-4B (tnx to WB6OGD and VE3FWF) to my SPR-4, I've got this left over from the mod...if you can use them, they are yours
Jim AB7VF 
On Sat, Jan 27, 2024 at 10:27?AM Rick W4XA < myr748@...> wrote: Does the SPR-4 use the "same" crystals as the other Drake (R-4x, 2-x)? receivers?
I think "AF4K" crystals has them for all the Drakes.
Cheers,
Rick
--
73/Rick
W4XA
*Every post is created using Linux
|
Jim Shorney
Dave W1VSX
Gary WB6OGD
