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From: Chuck Harris <cfharris@...>
Sent: Jul 26, 2018 11:59 PM
To: [email protected]
Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire

I have minimal experience with industrial soldering machines.? I
was a kid back in 1970, and a ham, and getting a job working for
DEI was like being let loose in a candy shop.? I did a ton of
odd jobs after the child labor bureau made me stop doing all of
their silver and gold plating.? I was a sponge, and soaked up every
process or technique I was exposed to.? Which was a lot.? I did
etching, plating, drilling, KPR, soldering, helped set up the
one-off machines that made standoffs and rivets... moved safes,
carried trash, pushed a broom... but I digress.

Nobody that I am aware of was using reflow ovens back in 1970.
Everything I saw was either through-hole, or was simple stuff
that was hand soldered on one of the teflon based pcb materials.

But I can only talk to what DEI, Nems-Clarke, and Vitro were did,
and also what a PCB manufacture/build/assemble house I worked at
later was doing.

I just did a search, and the only 80/20 alloy I could find was a
Pb80/Sn20, which has a solidus temperature of 183C and a liquidus
temperature of 280C.? That is as compared to 63/37 which is 183C.

Pb80/Sn20 would be wonderful for operations where you needed to
sculpt the solder, like a car fender, or the terminals on very high
voltage circuitry.? It would also be useful for soldering terminals
that might be later soldered with 63/37, such as the internal connections
on a modular mixer.

-Chuck Harris

Hi Tom,

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@...>
To: [email protected]
Sent: Friday, July 27, 2018 8:15:29 AM
Subject: Re: [TekScopes] 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.

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.

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!

From: "Tom Gardner" <tggzzz@...>
To: [email protected]
Sent: Friday, July 27, 2018 8:15:29 AM
Subject: Re: [TekScopes] 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.

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.

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!

From: "Tom Gardner" <tggzzz@...>
To: [email protected]
Sent: Friday, July 27, 2018 8:15:29 AM
Subject: Re: [TekScopes] 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.

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.

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!

From: "Brian Cockburn" <brian.cockburn.1959@...>
To: [email protected]
Sent: Friday, July 27, 2018 6:59:49 AM
Subject: Re: [TekScopes] Replacing Electrolytics in a 465/465B

Barry,

Although I'm not interested in these PCBs per se, could I make a
suggestion? Perhaps for international Tek fans you could put the design
(schematic, layout, & gerbers) on github, dropbox, or something similar?
That way people can use any of the many PCB fab companies (in China) to
get it done for themselves. This makes it easier for you, but obviously
you may lose control of the design going forward.

Cheers, Brian.

From: Chuck Harris <cfharris@...>
Sent: Jul 26, 2018 11:59 PM
To: [email protected]
Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire

I have minimal experience with industrial soldering machines. I
was a kid back in 1970, and a ham, and getting a job working for
DEI was like being let loose in a candy shop. I did a ton of
odd jobs after the child labor bureau made me stop doing all of
their silver and gold plating. I was a sponge, and soaked up every
process or technique I was exposed to. Which was a lot. I did
etching, plating, drilling, KPR, soldering, helped set up the
one-off machines that made standoffs and rivets... moved safes,
carried trash, pushed a broom... but I digress.

Nobody that I am aware of was using reflow ovens back in 1970.
Everything I saw was either through-hole, or was simple stuff
that was hand soldered on one of the teflon based pcb materials.

But I can only talk to what DEI, Nems-Clarke, and Vitro were did,
and also what a PCB manufacture/build/assemble house I worked at
later was doing.

I just did a search, and the only 80/20 alloy I could find was a
Pb80/Sn20, which has a solidus temperature of 183C and a liquidus
temperature of 280C. That is as compared to 63/37 which is 183C.

Pb80/Sn20 would be wonderful for operations where you needed to
sculpt the solder, like a car fender, or the terminals on very high
voltage circuitry. It would also be useful for soldering terminals
that might be later soldered with 63/37, such as the internal connections
on a modular mixer.

-Chuck Harris

-----Original Message-----
From: Colin Herbert via Groups.Io
Sent: Thursday, July 26, 2018 8:15 AM

Hi,
I know there have been enquiries as to whether the back-plane connections of
these two series are compatible, but that is not the question that I am
asking. I am wondering if the mechanical latching mechanism, with all of its
parts, is the same between these series. The manuals are not very clear.
Does anyone have any information on this? I am interested because I am
considering buying a parts-donor 5A22N to provide latch components for my FG
504.
TIA, Colin.

I had some from a company around Orlando that was 80/20. I thought that was odd, but it was in the original containers. We also got tons of what the wave solder machines in the area skimmed as waste. We sold it to a company that made cheap solder to re-refine. Another source was from a company that made marine wiring harnesses. 30 years ago, there were a lot of companies in Orlando using tons of solder.

Did you do any work with reflow ovens?

I never used a wave solder machine, but we had three reflow ovens at Microdyne. Two older 'pizza oven' models, and a new Heller with computer controlled, multiple zone operation that stored the profile for every board that we built.


Michael A. Terrell

From: Chuck Harris <cfharris@...>
Sent: Jul 26, 2018 7:15 PM
To: [email protected]
Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire

I have on hand about 100 lbs of 63/37 solder bars
that came from the wave soldering machine of one of
your competitors at microdyne. I know it is what
they used because it came with the wave soldering
machine when it was scrapped.

Also, when I worked for DEI back in the '70s, they
used 63/37 for their reflow machines.

On boards that get solder plated, the alloy is somewhat
imprecise, and it is possible that the imprecision of
that plated alloy will have diluted the 63/37 solder
to make it have a higher melting point.

But as a former solder plater, I can assure you that
we tried very hard not to let the alloy shift much
because it made the reflow process fail.

-Chuck Harris



Michael A. Terrell wrote:
...
Also, keep in mind that the solder used for wave soldering has a higher melting
temperature than that used for hand soldering. If you don't get it all out on the
first try, refill the through hole with 63/37 solder and try again.

Hey Mike, you know that iron I have with the red bulb. Ive used it but perhaps I need to try it again and reassess its crappyness UD

At 03:42 PM 7/23/2018, you wrote:

Thanks Fabio for the reply. I opened my PDF copy of the 464 manual and found the +15 volt end of the wire on the TRIG-VIEW switch but didn't know where it went from there. Did some careful perusing of the TRIG-GENERATOR SWEEP BOARD and found it at the bottom as you descibed it so then after I got my early 466 manual searched it out and found it also.
Appreciate the description of the circuit and also the chip diffs

i have started to put together the list of capacitors I am going to need and have pulled the 6 caps from the interface board for the 466 I did not have any real problem getting them off was a bit hesitant at first because of the horror stories on here from folks doing that. Some time back I picked up a real nice desoldering tool from Radio Shack it is a bulb sucker type with the bulb attached above the handle and to the tip with a tube so you can put the tip on the connection to be unsoldered and when soft just release the bulb cleans off and out all the solder.
Once I got the first one out it was easy to see how they were attached just put the tip hole down over the small pins first sucked out the solder so they were loose the worked on the big one wiggling the cap while heating took two three time to get it loose big hole filled up with solder on that one.

Have a question on two of the tant caps used in the power supply for one section of the output they are two 47uf 25v caps # 1712 & 1713 they are in a half wave rectified section and across the output for the +140v supply it seems that 25v is a bit low here? Any comments here?

Jim