Re: Defective 465: into the dumpster it goes!
Such a beautiful scope - I have one. Probably just a bad cap in the power supply section! What a waste! What a pinhead!
RIP 465!
JJ
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Re: Buying replacement tubes
Hi Dave,
Thanks for the tip... actually, BOTH tips!!! ;)
Best to you,
Phil
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On 8/31/2019 2:55 PM, ArtekManuals wrote: ...stand them up next to the xmas tree on a roll around base with a drink in their hand
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Re: Tektronix 011-0069-02 Attenuator
Jean-Paul -
I would also note that the HAT-6 is only a 1 Watt attenuator, and I need a 2 Watt attenuator.
--
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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Re: Buying replacement tubes
I have 3 5V4¡¯s if somebody wanted one
Regards,
Stephen Hanselman
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On Aug 31, 2019, at 15:08, Richard Knoppow <dickburk@...> wrote:
I vaguely remember using a 5AR4 as the rectifier for a tube amp I built maybe sixty years ago. It seems to me, without looking it up, it has a separate cathode and probably lower voltage drop than the filamentary cathode types. If some audiophile wants better B+ regulation silicon diodes are the way to go but a regulated power supply is better. OTOH, the DWP (power in Los Angeles) refused to install a solid silver pole pig here so I have given up on improving the supplies of my audio amplifiers. I wonder if you used a local generator for audio of the Fools would argue about the brand of gasoline (or diesel fuel) used to run it.
On 8/31/2019 2:45 PM, Phillip Potter wrote:
Hi Chuck,
While I was reading your comment to Jamie, I note with interest your suggestion that a 5AR4 is of little demand.? This tube number jogged my memory, and I found it easily in the Service Manual for my HP 200CD Signal Generator, where it is employed as a rectifier tube... I'm hoping that you're right about that, because I could use one for a spare. ;)
Phil
On 8/30/2019 6:45 PM, ChuckA wrote:
BTW a workable replacement for the 5AR4 is a 5V4 again a TV damper tube and very little demand outside of the TV collector community. --
Richard Knoppow
dickburk@...
WB6KBL
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Re: Tektronix 011-0069-02 Attenuator
On 8/31/2019 5:36 PM, Jean-Paul wrote: Dale, we use Mini Circuits HAT series attenuators DC-2GHz, $10 ea, highly recommended
Better than the old TEK parts. I sometimes use my Mini Circuits CAT series attenuators in 6, 10, and 20 dB, but I prefer the Tek attenuators, and most of my fixed in-line attenuators are Tek or GR using BNC or GR 874 connectors. For my purposes the Tek is ideal, as well as matching other Tek BNC attenuators and terminations that I own. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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Re: Tektronix 011-0069-02 Attenuator
On 8/31/2019 4:53 PM, Dennis Tillman wrote: I have no idea from your post what it is since I don't have any way to find
out more about this part number. I'm sure I'm not alone. Dennis - Scans of Tek catalogs are easily available online, and I would expect that anyone who deals much with Tek would have some of them. I have some of what is available online but seldom use them as I own about 75% of the Tek catalogs from 1970 to 1993 in print. For those unfamiliar with the Tek line of external attenuators and terminations, most of which were in production in the '70s, '80s, and '90s, see the selection guide to some of them at: I was asking about the 011-0069-02 because my other Tek attenuators are the -02 versions, but the -01 or -03 version would do as well for my purposes. The 011-0069-02 is a 50 Ohm, 2 Watt, 6dB fixed attenuator with male and female BNC connectors for in-line use. It has a VSWR of <1.1 from DC to 1 GHz and <1.2 from DC to 2 GHz. It is a stand-alone accessory and not used in anything. Also, since you mention that $60 is too much, what are you willing to pay
for one? I think $30.00 would be reasonable plus CONUS USPS first class postage. It is about 2-1/2" long, 3/4" wide, and weighs about 4 oz. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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Re: Defective 465: into the dumpster it goes!
The reverse Midas touch, apparently.
Geez, if something doesn't work and can't be fixed, it certainly offers a wealth of recyclable parts.
Bob
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On Saturday, August 31, 2019, 03:01:42 PM PDT, Raymond Domp Frank <hewpatek@...> wrote:
What follows is a longish and sad story.
A few days ago, I was contacted by someone who said he was looking for a good quality analog 'scope.
Without asking many questions, I showed him one of my 465's and he liked it. He expressed some concern as to the reliability of these very old instruments (I think this sample was from 1976/77). I told him that these old 'scopes were still "more usable than unreliable", that some parts did tend to fail from old age, especially the dipped tantalum caps but that diagnosis and repair was straightforward, that I would take care of repair for some time in the future for free and that I had an ample spare components supply of all sorts should they be needed.
He was going to use the 'scope mainly for adjusting radio receivers and was looking forward to the high vertical sensitivity, especially when using a 1:1 probe. This should have been a warning for me but I limited myself to explaining why the use of passive 1:1 probes cannot be recommended for some of his intended use (450 kHz and 10.7 MHz IF) and giving him an example of the math.
We agreed on a price and he left, happy with his newly acquired classic, or so I thought.
After a few days, he contacted me, asking for two knobs (A and B trigger level), since apparently parts had broken off. I told him that I'd send replacements for free.
Before I could send them, he contacted me, saying that the replacement knobs were no longer needed since the 'scope had broken down: no beam, no graticule illumination, no fan sound, and that he had concluded that his 'scope obviously was a total loss. He was sorry to tell me the bad news but he had very much appreciated my explanations and service and he definitely wouldn't want any money back. When I offered to repair the 'scope for free, he added that that wouldn't be possible, since it was now in an underground dumpster, inaccessible to him. He once again blamed himself for making the mistake of buying such an old piece of equipment and we "parted as friends".
I still feel for the poor lonely instrument enveloped in darkness...
Raymond
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Re: Buying replacement tubes
I vaguely remember using a 5AR4 as the rectifier for a tube amp I built maybe sixty years ago. It seems to me, without looking it up, it has a separate cathode and probably lower voltage drop than the filamentary cathode types. If some audiophile wants better B+ regulation silicon diodes are the way to go but a regulated power supply is better. OTOH, the DWP (power in Los Angeles) refused to install a solid silver pole pig here so I have given up on improving the supplies of my audio amplifiers. I wonder if you used a local generator for audio of the Fools would argue about the brand of gasoline (or diesel fuel) used to run it.
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On 8/31/2019 2:45 PM, Phillip Potter wrote: Hi Chuck,
While I was reading your comment to Jamie, I note with interest your suggestion that a 5AR4 is of little demand.? This tube number jogged my memory, and I found it easily in the Service Manual for my HP 200CD Signal Generator, where it is employed as a rectifier tube... I'm hoping that you're right about that, because I could use one for a spare. ;)
Phil
On 8/30/2019 6:45 PM, ChuckA wrote:
BTW a workable replacement for the 5AR4 is a 5V4 again a TV damper tube and very little demand outside of the TV collector community.
--
Richard Knoppow
dickburk@...
WB6KBL
|
Defective 465: into the dumpster it goes!
What follows is a longish and sad story.
A few days ago, I was contacted by someone who said he was looking for a good quality analog 'scope.
Without asking many questions, I showed him one of my 465's and he liked it. He expressed some concern as to the reliability of these very old instruments (I think this sample was from 1976/77). I told him that these old 'scopes were still "more usable than unreliable", that some parts did tend to fail from old age, especially the dipped tantalum caps but that diagnosis and repair was straightforward, that I would take care of repair for some time in the future for free and that I had an ample spare components supply of all sorts should they be needed.
He was going to use the 'scope mainly for adjusting radio receivers and was looking forward to the high vertical sensitivity, especially when using a 1:1 probe. This should have been a warning for me but I limited myself to explaining why the use of passive 1:1 probes cannot be recommended for some of his intended use (450 kHz and 10.7 MHz IF) and giving him an example of the math.
We agreed on a price and he left, happy with his newly acquired classic, or so I thought.
After a few days, he contacted me, asking for two knobs (A and B trigger level), since apparently parts had broken off. I told him that I'd send replacements for free.
Before I could send them, he contacted me, saying that the replacement knobs were no longer needed since the 'scope had broken down: no beam, no graticule illumination, no fan sound, and that he had concluded that his 'scope obviously was a total loss. He was sorry to tell me the bad news but he had very much appreciated my explanations and service and he definitely wouldn't want any money back. When I offered to repair the 'scope for free, he added that that wouldn't be possible, since it was now in an underground dumpster, inaccessible to him. He once again blamed himself for making the mistake of buying such an old piece of equipment and we "parted as friends".
I still feel for the poor lonely instrument enveloped in darkness...
Raymond
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Re: Buying replacement tubes
Phil
The replacement for the 5AR4 is a couple of solid sates diodes. You can simply solder them to the tube? socket underneath the chassis and leave the old dead 5AR4 plugged in for appearances ....... 8^).
It is too bad we cant get our loved ones taxidermy'd? ...stand them up next to the xmas tree on a roll around base with a drink in their hand
Dave
manuals@...
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On 8/31/2019 5:45 PM, Phillip Potter wrote: Hi Chuck,
While I was reading your comment to Jamie, I note with interest your suggestion that a 5AR4 is of little demand.? This tube number jogged my memory, and I found it easily in the Service Manual for my HP 200CD Signal Generator, where it is employed as a rectifier tube... I'm hoping that you're right about that, because I could use one for a spare. ;)
Phil
On 8/30/2019 6:45 PM, ChuckA wrote:
BTW a workable replacement for the 5AR4 is a 5V4 again a TV damper tube and very little demand outside of the TV collector community.
--
Dave
Manuals@...
www.ArtekManuals.com
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Re: Buying replacement tubes
Phil,
Just the opposite, the 5AR4 is the magical rectifier that makes a golden ear amplifier come alive. The 5V4 is the TV damper tube that is only of interest to antique TV collectors. I've used it in 502 scopes and seems to work reliably.
Chuck
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On 8/31/2019 5:45 PM, Phillip Potter wrote: Hi Chuck,
While I was reading your comment to Jamie, I note with interest your suggestion that a 5AR4 is of little demand.? This tube number jogged my memory, and I found it easily in the Service Manual for my HP 200CD Signal Generator, where it is employed as a rectifier tube... I'm hoping that you're right about that, because I could use one for a spare. ;)
Phil
On 8/30/2019 6:45 PM, ChuckA wrote:
BTW a workable replacement for the 5AR4 is a 5V4 again a TV damper tube and very little demand outside of the TV collector community.
--
See Early TV at:
www.myvintagetv.com
|
Re: Buying replacement tubes
Hi Chuck,
While I was reading your comment to Jamie, I note with interest your suggestion that a 5AR4 is of little demand.? This tube number jogged my memory, and I found it easily in the Service Manual for my HP 200CD Signal Generator, where it is employed as a rectifier tube... I'm hoping that you're right about that, because I could use one for a spare. ;)
Phil
toggle quoted message
Show quoted text
On 8/30/2019 6:45 PM, ChuckA wrote: BTW a workable replacement for the 5AR4 is a 5V4 again a TV damper tube and very little demand outside of the TV collector community.
|
Re: Tektronix 011-0069-02 Attenuator
Dale, we use Mini Circuits HAT series attenuators DC-2GHz, $10 ea, highly recommended
Better than the old TEK parts.
Jon
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Hello all curious about NVRAMs data.
Do the 2456B NVRAM images differ for various options eg 06, 09 GPIB, WR, CTT?
Or for different serial number ranges?
Or perhaps NVRAM images are same for all scopes of a type?
In other words are the options and serial range pre- stored in the NVRAM?
Many thanks
Jon
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Re: Tektronix 011-0069-02 Attenuator
50 Ohm 2 watt attenuator, with a male BNC on one end, and female on the other.? Can be plugged into a scope input. The one's I've seen are about 2" long and roughly the diameter of a Sarpie marker pen.
Use Google images if for a visual.
Regards,Vern
On Sat, Aug 31, 2019 at 1:53 PM, Dennis Tillman W7PF<dennis@...> wrote: Hi Dale,
I have no idea from your post what it is since I don't have any way to find
out more about this part number.
I'm sure I'm not alone.
I think you would improve your odds of getting a reply from someone who does
have one if you provided a description of what it is, what it is used in,
what it looks like, and any other details you have for it.
Also, since you mention that $60 is too much, what are you willing to pay
for one?
Dennis Tillman W7PF
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Dale H. Cook Sent: Saturday, August 31, 2019 12:28 PM To: [email protected]Subject: [TekScopes] Tektronix 011-0069-02 Attenuator Would anyone have a Tektronix 011-0069-02 attenuator for sale at a reasonable price? I see them online for over $60 with shipping, but that is a bit too spendy for my pocket. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA -- Dennis Tillman W7PF TekScopes Moderator
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Re: Tektronix 011-0069-02 Attenuator
Hi Dale,
I have no idea from your post what it is since I don't have any way to find
out more about this part number.
I'm sure I'm not alone.
I think you would improve your odds of getting a reply from someone who does
have one if you provided a description of what it is, what it is used in,
what it looks like, and any other details you have for it.
Also, since you mention that $60 is too much, what are you willing to pay
for one?
Dennis Tillman W7PF
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Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Dale H. Cook Sent: Saturday, August 31, 2019 12:28 PM To: [email protected]Subject: [TekScopes] Tektronix 011-0069-02 Attenuator Would anyone have a Tektronix 011-0069-02 attenuator for sale at a reasonable price? I see them online for over $60 with shipping, but that is a bit too spendy for my pocket. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA -- Dennis Tillman W7PF TekScopes Moderator
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Hi all,
I am looking to the group for suggestions/recommendations as I am in the market for a decent DSO. I currently have a TLS216, in fine condition, without probes (therefore not useful at all). Is this unit worth holding onto and gathering up probes for this unit or would it make more sense to move on to another unit with conventional BNC connectors, for ease?
Thank you,
CJ
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Tektronix 011-0069-02 Attenuator
Would anyone have a Tektronix 011-0069-02 attenuator for sale at a reasonable price? I see them online for over $60 with shipping, but that is a bit too spendy for my pocket.
--
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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WTB: 555 or 556 - will pick up
Good morning,
Does anyone have a 555 or 556 oscilloscope they would be willing to sell? I can take a road trip to pick up if you live within roughly 800 miles of Minneapolis, so any of these states:
WI, ND, SD, IA, IL, MI, IN, or NE
Non-working is fine, I'm just interested in working on building my queue of 500 series projects for learning and restoration work.
After a 30 year hiatus from the boatanchor hobby to work on family, career, it's finally time to buy some of the things I have drooled over for a long time and picking up where I left off.
Thanks!
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For sure Michael. Big oaks from little acorns grow !!!! Good idea of yoyurs to post that photo, it help me a lot as none of the information I had listed or showed placement of those components. When I have more time I will go over it again and probably change out the other 2.2uf caps in that part and also other Tants, have a collection of 25/35/50 volt ones so should be ok. It was fun, and nice meeting you. Take care mind how you go Thanks Jim On Sat, 31 Aug 2019 at 17:19, Michael W. Lynch via Groups.Io <mlynch003= [email protected]> wrote: Jim,
Great News! One never knows when one small component will completely
disable an instrument. Proving that every part is important, even critical
to proper operation.
Michael Lynch 479-226-0126 Home Phone479-477-1115 Cell
Phonemlynch001@[email protected]@...
On Saturday, August 31, 2019, 10:30:21 AM CDT, James R. Bartlett <
james.r.bart@...> wrote:
Hi Michael.
Latest update.
Scope is working again.
Changed C963, replaced R963,.
Had to readjust the pot,for the + 50 voltsupply, as +15 was showing +18,
Trace seems reasonable and all controls appear to work.
Probably needs a good going over but the main thing is it is working.
Many thanks to yourself and others who came up with various suggestions.
Hope you have a nice weekend and enjoy Labor Day.
Again thanks for all
Regards
Jim
In the land of the Leprechauns ?
On Fri, 30 Aug 2019 at 20:20, Mlynch001 <mlynch002@...> wrote:
Jim,
I will post this picture in the archives. someone else may have the same
issue with their 475.
--
Michael Lynch
Dardanelle, AR
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Dale H. Cook
Raymond Domp Frank
Jean-Paul