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Re: Repairing plated through holes.
Pace made a "fused eyelet setter" .
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This was an eyelet staking tool that ran high current, low voltage through the eyelet after the eyelet was staked and while the eyelet was still under compression. This fused the flared part of the eyelet to the lands. Motorola used eyeletted boards in some of their two way radios. This was the major source of failure as the eyelet solder connection broke free of the lands. The fix for this was to resolder all of the eyeletted connections on both the top and bottom of the board. One source of PCB repair things is Glenn On 6/15/2018 10:28 PM, lop pol via Groups.Io wrote:
I would like to affordably put together the things needed to repair plated through holes. Anyone have any thoughts? I'm asking because I dont want to buy this more than onct setter"e. My pocket has not much room for mistakes right now and i seem to do a lot better asking here before buying. Thanks guys --
----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" |
Re: Repairing plated through holes.
stefan_trethan
You can still buy the pop rivet nuts, but much more $$ than that.
You said they use an adapter, I have never seen that. Around here you need to buy a dedicated rivet nut tool for around $100 (which looks much like a slightly modified $20 pop rivet tool). I always speculated that they are set just like a pop rivet, but with a threaded rod instead of the discardable metal shank in a regular rivet. My plan was, should I ever need to set a rivet nut, that I would take a hard screw and put that in the rivet, and pull on the screw from the outside with a washer and a nut. Do you have any opinion if that plan might succeed? I have been curious about it for years. ST On Sat, Jun 16, 2018 at 5:40 PM, Michael A. Terrell <mike.terrell@...> wrote: They also made the rivnut,which is an internally threaded version of a pop rivet that used an adapter to set with a pop rivet tool. I used them in some projects. I wished that I had boght more of them, surplus. They were 50 cents/100 in USM boxes. |
Re: Repairing plated through holes.
They also made the rivnut,which is an internally threaded version of a pop rivet that used an adapter to set with a pop rivet tool. I used them in some projects. I wished that I had boght more of them, surplus. They were 50 cents/100 in USM boxes.
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Michael A. Terrell -----Original Message-----
From: "ebrucehunter via Groups.Io" <Brucekareen@...> |
Re: Repairing plated through holes.
The key is the eyelet technique only works with two layer boards. The art
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techniques for rebuilding through holes and multi-layer boards but it's not something you do yourself although I tried it a couple times by building my own Electrolux replating set up. On Fri, Jun 15, 2018, 10:38 PM Harvey White <madyn@...> wrote:
On Fri, 15 Jun 2018 20:33:52 -0700, you wrote:On Fri, Jun 15, 2018 at 08:17 pm, Mark Goldberg wrote:or |
Re: Repairing plated through holes.
About 50 years ago I purchased an eyelet press from Kepco, a company that then sold printed circuit board materials. At the time they offered a variety of different diameter rivets, of different lengths, and in both copper and brass. The press came with a number of special tips needed for the different size rivets. I was later able to fabricate special tips to also set Vector, rivet-type terminals.
Unfortunately, as a previous contributor has remarked, these eyelets almost always eventually gave trouble if not carefully soldered to the foil on both sides. Even soldered eyelets sometimes gave trouble, probably because, as another has mentioned, you need a little space under the head for solder to properly flow. In looking at the press, I saw something I had never noticed before. The press was made in Italy by United Shoe Machinery, the company that made eyeletting machinery for the shoe industry and the original developer of the pop-rivet. Bruce, KG6OJI |
Re: Flyke 3330b
No coffee yet this morning, I missed one of the 3s :-)
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Paul On Sat, Jun 16, 2018 at 10:27:42AM -0400, Artekmedia wrote:
Paul --
Paul Amaranth, GCIH | Rochester MI, USA Aurora Group, Inc. | Security, Systems & Software paul@... | Unix & Windows |
Re: Flyke 3330b
I am sure about the model 3330b is the correct info , i have a download for the manual but am having trouble with tracking down why it will not output , to me it seems as if the unit has no power at the mother board , there was a bad bux48a and a bad 2n2869 and a bad 250uf . I am stumped?
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On Sat, Jun 16, 2018 at 10:20 AM, Paul Amaranth<paul@...> wrote: Are you sure about that model number?? A fluke 330b comes up as a clamp on hand held.? Voltage standards were 332, 335, etc. From the context I'm assuming you're talking about one of the 80 pound voltage standards. There is a volt-nuts (metrology) subgroup on eevblog with discussions on these along with some very knowledgeable people who can help.? I have a 332b, pretty amazing piece of equipment. Get a manual and be extremetly careful when that thing is on if you have the cover off.? I think that inner cover can be at 1KV. ? Paul On Sat, Jun 16, 2018 at 09:57:22AM -0400, Artekmedia wrote:
Oliver --
Paul Amaranth, GCIH? | Rochester MI, USA? ? ? ? ? ? ? Aurora Group, Inc.? |? Security, Systems & Software paul@...? |? Unix & Windows |
Re: Flyke 3330b
Paul
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The 3330B is a Voltage/Current Calibrator -DC manuals@... On 6/16/2018 10:20 AM, Paul Amaranth wrote:
Are you sure about that model number? A fluke 330b comes up as a --
Dave Manuals@... www.ArtekManuals.com |
Re: Fluke 3330b
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-----Original Message-----
From: Artekmedia <manuals@...> |
Re: Flyke 3330b
Are you sure about that model number? A fluke 330b comes up as a
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clamp on hand held. Voltage standards were 332, 335, etc. From the context I'm assuming you're talking about one of the 80 pound voltage standards. There is a volt-nuts (metrology) subgroup on eevblog with discussions on these along with some very knowledgeable people who can help. I have a 332b, pretty amazing piece of equipment. Get a manual and be extremetly careful when that thing is on if you have the cover off. I think that inner cover can be at 1KV. Paul On Sat, Jun 16, 2018 at 09:57:22AM -0400, Artekmedia wrote:
Oliver --
Paul Amaranth, GCIH | Rochester MI, USA Aurora Group, Inc. | Security, Systems & Software paul@... | Unix & Windows |
Re: Flyke 3330b
Thanos for the info , the spelling was i mistake?
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On Sat, Jun 16, 2018 at 9:57 AM, Artekmedia<manuals@...> wrote: Oliver there is a Yahoo group "Fluke_DMM" . Not real active (compared to Tektronix and HP groups) but worth a try. (Also spelling it FLUKE instead of FLYKE helps :-)) -DC manuals@... On 6/16/2018 9:31 AM, oliver johnson via Groups.Io wrote:
I have a fluke 3330b , have no output . I am not sure where to post for a fluke but i figured someone could point me in the correct direction for a group that can help me , or if someone? here knows anything about going about fixing this voltage standard . --
Dave Manuals@... www.ArtekManuals.com |
Re: Flyke 3330b
Oliver
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there is a Yahoo group "Fluke_DMM" . Not real active (compared to Tektronix and HP groups) but worth a try. (Also spelling it FLUKE instead of FLYKE helps :-)) -DC manuals@... On 6/16/2018 9:31 AM, oliver johnson via Groups.Io wrote:
I have a fluke 3330b , have no output . I am not sure where to post for a fluke but i figured someone could point me in the correct direction for a group that can help me , or if someone here knows anything about going about fixing this voltage standard . --
Dave Manuals@... www.ArtekManuals.com |
Re: Help needed with no trace no beamfinder on 465 (not b)
Hello tek lovers ,had dame issue on a 465 ,but i have th¨¦ service manual ,this is ¨¤ should have Firts ,papier is betterave than on screen, issu was ¨¤ failed q 1472 pnp switching ,replaced with ¨¤ 2 n2904 and Works well !!
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Envoy¨¦ depuis mon Redmi 4X Le Albert Otten <aodiversen@...>, 16 juin 2018 1:42 PM a ¨¦crit :
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Re: Repairing plated through holes.
On Sat, Jun 16, 2018 at 03:27 am, David M wrote:
Ok. That is what I will do. The rivets/eyelets are really cheap most under .25 cents a piece at Mouser. I have a bunch of different punches so I will figure something out. Thanks for the input. |
Re: Help needed with no trace no beamfinder on 465 (not b)
Hi Keith,
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Obviously my suggestions are too cryptically for you. I hesitate to continue since in my opinion you should understand the purpose of test measurements, to learn something and also to protect the equipment and yourself from damage. But let me try to clarify my previous suggestions. Q1418 is the heart of the oscillator. Oscillation occurs because of the feedback from collector to base provided by the windings 6-7 and 8-9 of the transformer. The voltage and current amplitude in these windings is determined by average base current which has to come from the regulator circuit, Q1416 emitter. The oscillator produces an up-transformed alternating voltage in the HV winding between pins 23 and 5 which is half-wave rectified by CR1421 to give a negative HV at C1421 to C1424 and CRT cathode. A fault could be that one of these HV caps (or even C1488) starts to leak at say 70 V. That would put extra load on the oscillator in its start-up phase and and prevent the amplitude to rise further. Another fault could be that CR1421 starts to leak, with the same consequence. Both these fault would show up of you externally feed TP1423 with a high enough negative voltage (scope disconnected from the power inlet of course). I simply use my 576 curve tracer for this purpose but you have to improvise something. A DC supply, preferably variable, would be needed, with + to scope ground and ¨C to TP via a DMM. The DMM at say 200 V DC range. The DMM is 10 M (usually), the load on TP is about 30 M. So the DMM reading should be about 25% of the supply voltage and maintain that percentage when the supply voltage is increased. When the percentage starts to increase it indicates leakage somewhere, and you can also try to estimate how heavy that leakage is. Of course this would eliminate only a leakage fault in the branch from CR1421. A fault in the branche from pin 3 is not very likely, it¡¯s low voltage. That leaves a fault in the transformer itself (any winding could be involved) or in the HV multiplier. Suppose you disconnect P1400. Then you can supply an AC voltage across the collector winding between pin 1 of P1400 socket and the fuse holder terminal. I use a sine wave function generator for this. The generator output is w.r.t. generator ground, so I connect that side to the fuse and the live side to mentioned pin 1. (Additionally the fuse side can be shorted to scope ground to prevent any floating voltage levels inside the scope.) Some people use an audio amplifier. This way I can control the input frequency an voltage amplitude. I also monitor the generator output current and the TP voltage. With all this information I can check that the resonance frequency is about what it should be (maybe 50 kHz for a 465? I didn¡¯t look it up) and also see if stange things happen if I increase the amplitude. L1419 and C1418/C1419 mainly serve to prevent oscillator signals to enter 15 V elsewhere. I think that even without these C¡¯s the oscillator should still work. Albert On Fri, Jun 15, 2018 at 05:50 pm, Keith Ostertag wrote:
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Re: Repairing plated through holes.
Search Ebay for Copper Via Rivets. They are available in several diameters and lengths. You'll have to come up with your own method and tooling to stake them to the PCB, but shouldn't be difficult.
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Small nails, small hole punch, etc. should to the trick. Yankee ingenuity rules. Cheers, Dave M On Fri, Jun 15, 2018 at 07:28 pm, lop pol wrote:
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