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Re: Radio Shack update
At 11:50 AM 7/27/2018, Harvey White wrote:
There's a local Rat Shack, but apparently this (and most) are allThere are about 400 RS franchise stores nationwide. In the course of my travels for work I get by two of them, one with a modest stock of RS parts and one with a better stock. The RS franchise store that has the b largest stock in my region is off my normal routes, but when I have time I detour there a few times each year to stock up. Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA |
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
stefan_trethan
Brass has quite poor heat conductivity, less than a third that of
copper, not sure if that would still work. I don't know how well it holds up, since I have never seen a soldering tip made of brass, if it gets eaten like copper or no. If you want decent life you want to have iron plating. Some manufacturers (Plato, Ersa) even used to put little iron ferrules into their desoldering tips. I have cheap chinese desoldering stations at home and at work (Zhongdi ZD-915), but heavily modified. With the one at work there is very little left of the original station. They work so good now I was so far unable to find a better commercial station, even the $1000 ones are not as good as the cheap $100 chinese one, although they probably have well over $1000 in modification time in them. As soon as anyone demonstrates a better desoldering station he can have the $1000 I've put on the budget for it, but I won't give the money away for something that doesn't work as well as what I have come up with myself. I'd like to try the new ersa x-tool vario, it seems well thought out, but it was unavailable last time I tried to get one. ST On Fri, Jul 27, 2018 at 5:18 PM, Michael A. Terrell <mike.terrell@...> wrote: I only lifted a couple pads, out of thousands. The ones that did lift were on very low grade consumer products. I agree that there are better methods available today, but what else was available to most of us, in the pre-internet days? |
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I've used my Radio Shack solder sucker (not the bulb but the spring-loaded cylinder version) with pretty good success but I have lifted a couple of pads along the way. I really, really need to get something like the Hakko. I watched a video this morning where it was used to desolder a component board from another board that had around eight pins soldered with through-holes to the larger board. After the Hakko was finished (in less than a minute total time), the secondary board practically fell out. Impressive.
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Thanks, Barry - N4BUQ ----- Original Message -----
From: "Ray Burke" <burke.ray@...> |
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Soviet sampling system, and more
Another of my not-quite-off-topic posts about the Soviet plugin scope series that was clearly inspired by the Tek 7k series. Having started investigating this stuff, I'm now playing a sort of plugin Pokemon - gotta get 'em all.
I'm excited about a consignment which is now on its way to me from St Petersburg containing not only the Ya4S-95 and Ya4S-96 sampling plugins, but also the elusive sampling head which goes with them, and in addition a Ya4S-89 pulse generator complete with its tunnel diode heads. This setup is roughly equivalent to a 7T11/dual 7S11 configuration with a pair of S-6 30ps feedthrough samplers and an S-52 pulse generator. I can't wait to find out how (and indeed if) it performs. Sadly its only the earlier '12GHz' sampling system, not the later '18GHz' one, but fascinating (and probably actually quite useful) nonetheless. More details next week when I get my hands on the package, all being well. Chris |
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Re: What type plastic case for 1502-1503 TDR?
For quite some time, large plastic parts often have had the plastic type identified with a stamp built into the molding dies. I don't know if this was common back then, but you can try looking around at the insides of the parts for any ID marks. It may be a recognizable code, like "ABS," or possibly something cryptic, making it more difficult. If you can ID the type, that would help to figure out the best bonding methods.
I would think that nowadays, any plastic parts above a certain size have standardized codes stamped in, for recycling purposes. Ed |
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Re: What type plastic case for 1502-1503 TDR?
I have used methylene chloride (dichloromethane) very successfully on 1502 cases. I've repaired both hairline cracks and 1" bits chipped/broken off without problems.
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Be careful, since it is an unpleasant chemical. On 27/07/18 17:27, Carl Hallberg via Groups.Io wrote:
I had one of the cases repaired by a person who uses plastic welding and it turned out bad. He wasn't sure what the material was. Looking inside the case I can see some type of dark glue that attached the original segments. Searching the manuals gave no indication, but maybe I missed it. Would be nice if there is a solvent type glue. Thanks in advance. |
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What type plastic case for 1502-1503 TDR?
I had one of the cases repaired by a person who uses plastic welding and it turned out bad. He wasn't sure what the material was. Looking inside the case I can see some type of dark glue that attached the original segments. Searching the manuals gave no indication, but maybe I missed it. Would be nice if there is a solvent type glue. Thanks in advance.
Carl Hallberg (W9CJH) |
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Re: All TekScopes email sent to Spam
Thanks to all who responded to my problem. Some didn't know that my email server is YAHOO, and mentioned only groups.io. When we do a round table discussion the original message gets lost. I no longer have the problem.
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Carl Hallberg (W9CJH) -------------------------------------------- On Wed, 7/25/18, Carl Hallberg via Groups.Io <n9ess@...> wrote:
Subject: [TekScopes] All TekScopes email sent to Spam To: [email protected] Date: Wednesday, July 25, 2018, 1:35 PM Help, Now all my TekScopes email is sent to spam folder.? Is this a Yahoo problem?? Carl Hallberg? (W9CJH) |
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Re: Radio Shack update
On Fri, 27 Jul 2018 11:21:50 -0400, you wrote:
There's a local Rat Shack, but apparently this (and most) are all franchise stores, carrying branded stuff, but not just that. Normally don't need to go there. Harvey
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Re: Radio Shack update
Hope this appropriate ...
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FYI I received this just moments ago ... Hobbyist? Maker? Do-It-Yourselfer? Announcing over 60 new RadioShack Express HobbyTown stores stocked with everything you need to build, play, and learn! Visit a participating HobbyTown or RadioShack dealer near you for tools, solder, parts, components, batteries, and more. Copyright ? 2018 General Wireless Operations Inc, dba RadioShack 801 NE 38th Street Fort Worth, Texas 76106 -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Joel R Kist Sent: Friday, July 27, 2018 11:12 AM To: [email protected] Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire Radio Shack is NOT gone ... Just wanted to let all know: check listing in your area: also they have other companies selling their items much like Sears did. Joel -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ray Burke Sent: Friday, July 27, 2018 10:11 AM To: [email protected] Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire The Radio Shack Desoldering bulb is useless because you cant get the tips any more, no more Radio Shack. I have used the Radio Shack Desoldering bulb, (have one). Solder Wick, Solder Suckers and other tools, while they are cheap, they do cause damage to the circuit boards with pulled pads, through holes, and other problems, ( I have used them and damaged my boards). Don't use any of the cheap alternatives, if you want to save the circuit boards. Use at least a good Desoldering gun or station. Use at least a Hakko FR-301 which I just bought, or a better Hakko Desoldering station, there are others that are more expensive like Pace, Metcal, which I used at work. I just used it to repair my wifes monitor that died with no power, and opened it up and found about three bulging capacitors, replaced all eight on the power supply, and fixed it. After getting the caps at Fry's it only took me about 20 minutes to change all eight, love my new Desoldering gun, NO PULLED PADS. One other thing is manufacture support, Hakko is the best. I got a desoldering station from my work, which they didn't want any more and Hakko had the tips for the thing. Now you could get some cheap Chinese knockoff but support may not be their in a few years, or at all. Buy at least a Hakko and you won't be disappointed. The other main desoldering companies are more expensive. You could check out the tear apart videos of the www.EEVBlog with Dave Jones. On Thursday, July 26, 2018 11:36 PM, Michael A. Terrell <mike.terrell@...> wrote: I started working in a TV shop at 13, in 1965. One older tech was a fountain of practical knowledge. I wasn't old enough to open an account at the local parts house, so he would buy things for me so Ii didn't have to go through our boss and pay his markup. He bought me my first desoldering iron which was a professional version of that Radio Shack version. It was made by Endevco, and it was almost $40 which was a lot for a kid making a buck an hour after school. He was also the one who got me started on Ersin Multicore solder. I've never regretted paying a little extra for good solder, because there was very little waste. We handed the resale of a wave solder machine for Lockheed Martin around 1990, along with other process equipment after they shut down a production line in one of the Orlando plants. Microdyne was still using the same grade of paste solder they tarted with, even though the SMD parts were a lot smaller than the first they used. I had to fight with Manufacturing engineering to buy a type with smaller solder balls and a RMA flux. The fine pitch ICs (IE: MC68340) came out of the early ovens with unmelted solder balls under the ICs, and the 0402 passives were tombstoning. They had spent a wad on that Heller oven, but the quality hadn't changed. Once we had better solder, we could refine the reflow profiles. That eliminated over 95% of the reflow problems within a few months, as they continued to refine the profiles. Did you build much equipment for your Amateur radio hobby? I went a different route, into broadcasting. Not many hams ever got to pump out 5MW EIRP of RF from a 1700 foot tower. :) Michael A. Terrell -----Original Message----- From: Chuck Harris <cfharris@...> |
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
I only lifted a couple pads, out of thousands. The ones that did lift were on very low grade consumer products. I agree that there are better methods available today, but what else was available to most of us, in the pre-internet days?
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I have about a dozen new spare tips, and a 7x14 metal lathe. Some hard brass rod and a little time machining it will give me more of them if I ever need them. I'm in my late 60s, and no longer spend full days reworking PC boards. I worked at a defense plant back in the '70s, after my time in the Army. The women doing the rework had no desoldering irons, only wet wicking. They were all put through the NASA approved soldering course, yet I could do things they couldn't. Their boss 'borrowed' me to teach them some new things, in spite of their union steward's instance that no man could solder. I spent the rest of my time there doing QA and Module interchangeability on the PRC77 manpack radios. Michael A. Terrell -----Original Message-----
From: Ray Burke <burke.ray@...> |
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
Radio Shack is NOT gone ... Just wanted to let all know: check listing in your area: also they have other companies selling their items much like Sears did.
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Joel -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ray Burke Sent: Friday, July 27, 2018 10:11 AM To: [email protected] Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire The Radio Shack Desoldering bulb is useless because you cant get the tips any more, no more Radio Shack. I have used the Radio Shack Desoldering bulb, (have one). Solder Wick, Solder Suckers and other tools, while they are cheap, they do cause damage to the circuit boards with pulled pads, through holes, and other problems, ( I have used them and damaged my boards). Don't use any of the cheap alternatives, if you want to save the circuit boards. Use at least a good Desoldering gun or station. Use at least a Hakko FR-301 which I just bought, or a better Hakko Desoldering station, there are others that are more expensive like Pace, Metcal, which I used at work. I just used it to repair my wifes monitor that died with no power, and opened it up and found about three bulging capacitors, replaced all eight on the power supply, and fixed it. After getting the caps at Fry's it only took me about 20 minutes to change all eight, love my new Desoldering gun, NO PULLED PADS. One other thing is manufacture support, Hakko is the best. I got a desoldering station from my work, which they didn't want any more and Hakko had the tips for the thing. Now you could get some cheap Chinese knockoff but support may not be their in a few years, or at all. Buy at least a Hakko and you won't be disappointed. The other main desoldering companies are more expensive. You could check out the tear apart videos of the www.EEVBlog with Dave Jones. On Thursday, July 26, 2018 11:36 PM, Michael A. Terrell <mike.terrell@...> wrote: I started working in a TV shop at 13, in 1965. One older tech was a fountain of practical knowledge. I wasn't old enough to open an account at the local parts house, so he would buy things for me so Ii didn't have to go through our boss and pay his markup. He bought me my first desoldering iron which was a professional version of that Radio Shack version. It was made by Endevco, and it was almost $40 which was a lot for a kid making a buck an hour after school. He was also the one who got me started on Ersin Multicore solder. I've never regretted paying a little extra for good solder, because there was very little waste. We handed the resale of a wave solder machine for Lockheed Martin around 1990, along with other process equipment after they shut down a production line in one of the Orlando plants. Microdyne was still using the same grade of paste solder they tarted with, even though the SMD parts were a lot smaller than the first they used. I had to fight with Manufacturing engineering to buy a type with smaller solder balls and a RMA flux. The fine pitch ICs (IE: MC68340) came out of the early ovens with unmelted solder balls under the ICs, and the 0402 passives were tombstoning. They had spent a wad on that Heller oven, but the quality hadn't changed. Once we had better solder, we could refine the reflow profiles. That eliminated over 95% of the reflow problems within a few months, as they continued to refine the profiles. Did you build much equipment for your Amateur radio hobby? I went a different route, into broadcasting. Not many hams ever got to pump out 5MW EIRP of RF from a 1700 foot tower. :) Michael A. Terrell -----Original Message----- From: Chuck Harris <cfharris@...> |
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Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire
The Radio Shack Desoldering bulb is useless?because you cant get the tips any more, no more Radio Shack.? I have used the?Radio Shack Desoldering bulb, (have one).? Solder Wick, Solder Suckers?and other tools, while they are cheap, they do cause damage to the circuit boards with pulled pads, through holes, and other problems, ( I have used them and damaged my boards).? Don't use any of the cheap alternatives, if you want to save the circuit boards.? Use at least a good?Desoldering gun or station.? Use at least a Hakko FR-301 which I just bought, or a better Hakko Desoldering station, there are others that are more expensive like Pace, Metcal, which I used at work.? I?just?used it to repair my wifes monitor?that died?with no power, and opened it up and found?about three bulging capacitors, replaced all eight on the power supply, and fixed it.? After getting the caps at Fry's it only took? me about 20 minutes to change all eight, love my new Desoldering gun, NO PULLED PADS.? One other thing is manufacture support, Hakko is the best.? I got a desoldering station from my work, which they didn't want any more and Hakko had?the tips for the thing.? Now you could?get some cheap Chinese knockoff but support may not be their in a few years, or at all.? ??Buy at least a Hakko?and you?won't be disappointed.?The other main desoldering companies are more expensive.? You could check out the tear apart videos of the ?www.EEVBlog with Dave Jones.
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On Thursday, July 26, 2018 11:36 PM, Michael A. Terrell <mike.terrell@...> wrote:
I started working in a TV shop at 13, in 1965. One older tech was a fountain of practical knowledge. I wasn't old enough to open an account at the local parts house, so he would buy things for me so Ii didn't have to go through our boss and pay his markup. He bought me my first desoldering iron which was a professional version of that Radio Shack version. It was made by Endevco, and it was almost $40 which was a lot for a kid making a buck an hour after school. He was also the one who got me started on Ersin Multicore solder. I've never regretted paying a little extra for good solder, because there was very little waste. We handed the resale of a wave solder machine for Lockheed Martin around 1990, along with other process equipment after they shut down a production line in one of the Orlando plants. Microdyne was still using the same grade of paste solder they tarted with, even though the SMD parts were a lot smaller than the first they used. I had to fight with Manufacturing engineering to buy a type with smaller solder balls and a RMA flux. The fine pitch ICs (IE: MC68340) came out of the early ovens with unmelted solder balls under the ICs, and the 0402 passives were tombstoning. They had spent a wad on that Heller oven, but the quality hadn't changed. Once we had better solder, we could refine the reflow profiles. That eliminated over 95% of the reflow problems within a few months, as they continued to refine the profiles. Did you build much equipment for your Amateur radio hobby? I went a different route, into broadcasting. Not many hams ever got to pump out 5MW EIRP of RF from a 1700 foot tower. :) Michael A. Terrell -----Original Message----- From: Chuck Harris <cfharris@...> |
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Re: Replacing Electrolytics in a 465/465B
There are, indeed, many cheap/fast PCB suppliers. Most won't "advertise" /other/ people's boards, nor allow you to buy them.
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If I was to make such a board, I couldn't be bothered with all the hassle to send it to other people, but I would be happy for them to buy them directly from source. On 27/07/18 14:20, n4buq wrote:
Hi Tom, |
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Re: Replacing Electrolytics in a 465/465B
When I designed the board, I intentionally made it one-sided to eliminate the exposure of the higher voltages to the top side of the board. In retrospect, those would be very difficult to get one's fingers on when the board is installed - much more difficult than the exposed circuit on the bottom side of the main board. Given that, I may go with a double-sided board so that the connecting wires protrude from underneath the board which I think would make a neater installation.
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Thanks, Barry - N4BUQ ----- Original Message -----
From: "Tom Gardner" <tggzzz@...> |
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Re: Substitutions for 465, 475, & 485 semiconductors
Hi Reginald,
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Have you taken a look at the tremendous collection of stuff on Hakanh's site? There is a semiconductor workbook at (bottom of the page, more or less) which may help you. Stan Griffiths' page used to have some useful stuff, too (such as CRT/scope info), but it seems to be currently unavailable... Colin. -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Reginald Beardsley via Groups.Io Sent: 27 July 2018 12:41 To: [email protected] Subject: Re: [TekScopes] Substitutions for 465, 475, & 485 semiconductors I'm well aware of the site. But I had not found a substitution list on it. All a search with google produced was quotations from manuals about checking by substitution. But I did find the Tek cross reference when I thought to provide the right synonym. Thanks. |
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Re: Replacing Electrolytics in a 465/465B
Hi Tom,
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I've used them before. I used JLCPCB for these boards. I'm pretty sure there are several options for inexpensive boards like these. Thanks, Barry - N4BUQ ----- Original Message -----
From: "Tom Gardner" <tggzzz@...> |
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Re: Replacing Electrolytics in a 465/465B
On 27/07/18 13:33, n4buq wrote:
I may do that. If someone wants just one, then it's somewhat cheaper to get it from someone (me?) who orders a batch. I'm probably going to order one more batch with the updates I mentioned and then turn it loose.Alternative: use You can make the design available for anyone else to order: That saves you hassle and you are given some credit against your next order. Of course you can't make a profit either :) You can fit a single "figure of eight" pcb containing two circular "capacitor converters" in a 50x50mm board, provided you rotate the "8" by 45 degrees. Cost $12 for 10 boards, i.e. 20 capacitors. That's a lifetime supply for most people! |
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Re: Replacing Electrolytics in a 465/465B
I may do that. If someone wants just one, then it's somewhat cheaper to get it from someone (me?) who orders a batch. I'm probably going to order one more batch with the updates I mentioned and then turn it loose.
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I need to make a PDF of process as well. There are some considerations that I really didn't mention (e.g. some jumpers need to be put in place or extra ground wires run to the board, etc.) and a better document will help there. Thanks, Barry - N4BUQ ----- Original Message -----
From: "Brian Cockburn" <brian.cockburn.1959@...> |
Dale H. Cook
Michael A. Terrell
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