7CT1N plugin boards


Harvey White
 

For those who did not see, I am offering two boards per person, all you need to is contact me off list, and send an SASE (self addressed, stamped envelope) with enough postage to get the boards back home.  The boards are free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570


You will need:

one switch


E-Switch 400UDP1L1BLKM6RE @$3.30

three banana plugs

*Johnson/Cinch 108-0753-001 @$1.35 each*

You may substitute for the banana plugs as desired, as long as they fit.  The E-Switch was picked because of price and size, and that it is a currently available model.  You could just bypass it with two jumpers and not switch between A and B.

Two or four transistor sockets.

Your choice on this, the TO5 case can accept  pin sockets of the right size, or a standard transistor socket, as can the smaller socket.


each board weighs 1/10 oz, or about 3 grams each

Two boards are 2/10 oz, so a stamp, SASE and two boards should weigh well within the limits of US first class mail.

Harvey



**


Stephen
 

Very nice. I wished I had a 7CT1N. Been looking for one for a while.


Harvey White
 

The reason I am limiting this to two boards is that I have no idea of the demand, so two ought to give people a good chance to get a set.  Depending on demand, I may change my mind.

Harvey

On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you need to is contact me off list, and send an SASE (self addressed, stamped envelope) with enough postage to get the boards back home.  The boards are free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570


You will need:

one switch


   E-Switch 400UDP1L1BLKM6RE @$3.30

three banana plugs

*Johnson/Cinch 108-0753-001 @$1.35 each*

You may substitute for the banana plugs as desired, as long as they fit.  The E-Switch was picked because of price and size, and that it is a currently available model.  You could just bypass it with two jumpers and not switch between A and B.

Two or four transistor sockets.

Your choice on this, the TO5 case can accept  pin sockets of the right size, or a standard transistor socket, as can the smaller socket.


each board weighs 1/10 oz, or about 3 grams each

Two boards are 2/10 oz, so a stamp, SASE and two boards should weigh well within the limits of US first class mail.

Harvey



**






 

Harvey,

How do I contact you off-list? Your avatar is non-clickable and does not reveal your email.

(mine does, so you can reply to my email)

-- Jeff Dutky


Paul Amaranth
 

Hi Harvey

I'll take a set, send me your address oflist and I'll get a sase to
you. Email in the sig

thanks
Paul

On Fri, Apr 02, 2021 at 04:07:30PM -0400, Harvey White wrote:
The reason I am limiting this to two boards is that I have no idea of the
demand, so two ought to give people a good chance to get a set.  Depending
on demand, I may change my mind.

Harvey


On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed, stamped
envelope) with enough postage to get the boards back home.  The boards are
free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570

--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows


Harvey White
 

Your email server doesn't like me, I get an "access denied". twice.....

Harvey

On 4/2/2021 4:25 PM, Paul Amaranth wrote:
Hi Harvey

I'll take a set, send me your address oflist and I'll get a sase to
you. Email in the sig

thanks
Paul

On Fri, Apr 02, 2021 at 04:07:30PM -0400, Harvey White wrote:
The reason I am limiting this to two boards is that I have no idea of the
demand, so two ought to give people a good chance to get a set.  Depending
on demand, I may change my mind.

Harvey


On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed, stamped
envelope) with enough postage to get the boards back home.  The boards are
free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570


Paul Amaranth
 

Yes, I couldn't send mail directly to you either :-)

Put a couple aside and let me look into this.

Paul

On Fri, Apr 02, 2021 at 05:00:50PM -0400, Harvey White wrote:
Your email server doesn't like me, I get an "access denied". twice.....

Harvey


On 4/2/2021 4:25 PM, Paul Amaranth wrote:
Hi Harvey

I'll take a set, send me your address oflist and I'll get a sase to
you. Email in the sig

thanks
Paul

On Fri, Apr 02, 2021 at 04:07:30PM -0400, Harvey White wrote:
The reason I am limiting this to two boards is that I have no idea of the
demand, so two ought to give people a good chance to get a set.  Depending
on demand, I may change my mind.

Harvey


On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed, stamped
envelope) with enough postage to get the boards back home.  The boards are
free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570






!DSPAM:60678611159499240115645!
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows


Harvey White
 

gotcha.

done.

Harvey

On 4/2/2021 5:58 PM, Paul Amaranth wrote:
Yes, I couldn't send mail directly to you either :-)

Put a couple aside and let me look into this.

Paul

On Fri, Apr 02, 2021 at 05:00:50PM -0400, Harvey White wrote:
Your email server doesn't like me, I get an "access denied". twice.....

Harvey


On 4/2/2021 4:25 PM, Paul Amaranth wrote:
Hi Harvey

I'll take a set, send me your address oflist and I'll get a sase to
you. Email in the sig

thanks
Paul

On Fri, Apr 02, 2021 at 04:07:30PM -0400, Harvey White wrote:
The reason I am limiting this to two boards is that I have no idea of the
demand, so two ought to give people a good chance to get a set.  Depending
on demand, I may change my mind.

Harvey


On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed, stamped
envelope) with enough postage to get the boards back home.  The boards are
free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570





!DSPAM:60678611159499240115645!


Harvey White
 

I've just found out several things about International first class mail.

1) it can be expensive

2) you can't usually buy US stamps where you are (wonder why?)

so I'd propose this:

the cost of a 1 ounce (which this is under) US mail envelope is $1.20 USD.

There's no real way to get me that money, so I'm afraid that you're stuck sending me a letter.

If you can send $2.00 USD (all I've got requests from is Canada) in the SASE, I'll take care of the visit to the P.0.

Some of the extra is a bit of compensation for the trip.  Sorry about that, but for some odd reason, the US will not honor Canadian postal stamps.

odd......

If this becomes a problem, we can work something out, I think.

A learning experience, it is......

Harvey

On 4/2/2021 3:06 PM, Harvey White wrote:
For those who did not see, I am offering two boards per person, all you need to is contact me off list, and send an SASE (self addressed, stamped envelope) with enough postage to get the boards back home.  The boards are free.


Photos added in album 7CT1N test fixture

https://groups.io/g/TekScopes/album?id=262570


You will need:

one switch


   E-Switch 400UDP1L1BLKM6RE @$3.30

three banana plugs

*Johnson/Cinch 108-0753-001 @$1.35 each*

You may substitute for the banana plugs as desired, as long as they fit.  The E-Switch was picked because of price and size, and that it is a currently available model.  You could just bypass it with two jumpers and not switch between A and B.

Two or four transistor sockets.

Your choice on this, the TO5 case can accept  pin sockets of the right size, or a standard transistor socket, as can the smaller socket.


each board weighs 1/10 oz, or about 3 grams each

Two boards are 2/10 oz, so a stamp, SASE and two boards should weigh well within the limits of US first class mail.

Harvey



**






Ke-Fong Lin
 

For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed,
stamped envelope) with enough postage to get the boards back home.  The
boards are free.
Hi Harvey,

If you're not considering selling them, have you considered to just make the gerber files available online (let's say github)?
A lot of people now regularly buy PCBs from JLCPCB or pcbway. They can basically just "batch" these boards in one order.

Best regards,


Harvey White
 

I would do that, except for one small problem.  I'm using EAGLE 7.x with a hobby style license.  I am specifically prohibited from selling the boards.  Now, if I could guarantee that nobody would make the boards and sell them, that might be fine.

As to the design, it's essentially trival for anyone with another PCB program (other than EAGLE) to use.  For EAGLE, easy enough to make and do, it's the license that's the problem.

Harvey

On 4/3/2021 4:45 PM, Ke-Fong Lin wrote:
For those who did not see, I am offering two boards per person, all you
need to is contact me off list, and send an SASE (self addressed,
stamped envelope) with enough postage to get the boards back home.  The
boards are free.
Hi Harvey,

If you're not considering selling them, have you considered to just make the gerber files available online (let's say github)?
A lot of people now regularly buy PCBs from JLCPCB or pcbway. They can basically just "batch" these boards in one order.

Best regards,





Paul McClay
 

Hi Harvey,

I don't have a [5]CT1N - yet - just a low priority slot on the wish-list.

If you have boards left after distributing to everyone with more concrete use for them, please email me your address. Via my profile here.


Harvey White
 

Jeff, do you make PC boards or design them?  I have a capacitor template I could throw in, since you overachieved a bit with the return packaging.


Harvey


 

Hi Harvey,
Thank you for making the 5CT1N / 7CT1N Adapter available to the members of TekScopes. That is very generous.
For at least the past 5 years I have been creating prototypes of a dual transistor adapter but until about 2 weeks ago I was never satisfied with the results.
I compliment you on the absolute simplicity of your design. I cannot imagine that anyone could make it simpler. My solution looks more like an actual Tek designed adapter.

As you have discovered by now even something as simple as giving away your PC boards for free gets complicated by reality.
I think I can solve this dilemma for you. I propose two possible solutions:
#1 Solution: Make a PDF available of what you designed that anyone else can use as a guide to make their own PCBs. You will not be violating the Eagle license by sharing your schematic and board layout in a PDF since there are no Gerber files involved.
1) Make a copy of the schematic (In Eagle the sequence is: File > Export > Image > Clipboard) and save it in Word (or whatever word processor you use).
2) Next do the same for the board.
3) Save your word processor's document as a PDF so everyone can read it
4) Upload the PDF to the Files section on TekScopes

#2 Solution: Reimburse you from the TekScopes account:
1) For the people who cannot send you a SASE send them two of your boards and keep track of what you spend to do this.
2) After 1 month notify everyone this is their last chance to get your boards
3) Wait another week for the last requests for your boards to arrive then send me the amount you spent on postage and I will reimburse you from donations to the TekScopes account.
--
Dennis Tillman W7pF
TekScopes Moderator


Harvey White
 

Comments interleaved, thank you.

On 4/13/2021 9:23 AM, Dennis Tillman W7pF wrote:
Hi Harvey,
Thank you for making the 5CT1N / 7CT1N Adapter available to the members of TekScopes. That is very generous.
For at least the past 5 years I have been creating prototypes of a dual transistor adapter but until about 2 weeks ago I was never satisfied with the results.
I compliment you on the absolute simplicity of your design. I cannot imagine that anyone could make it simpler. My solution looks more like an actual Tek designed adapter.
The only complication I could add would be to put in some surface mount (0805) ferrite inductors.  I haven't seen the need yet. This was only for small signal transistors, and is a solution that keeps the alligator clips away.

The switch is optional, and if you want to do one transistor (and not a compare A-B) then it can be jumped with a savings of the switch cost.


As you have discovered by now even something as simple as giving away your PC boards for free gets complicated by reality.
I think I can solve this dilemma for you. I propose two possible solutions:
It's not really a dilemma.  The only people who have problems with a SASE are the people not living in the US.  I plan to make a pay-pal account available for the cost of the international first class mail.
#1 Solution: Make a PDF available of what you designed that anyone else can use as a guide to make their own PCBs. You will not be violating the Eagle license by sharing your schematic and board layout in a PDF since there are no Gerber files involved.
1) Make a copy of the schematic (In Eagle the sequence is: File > Export > Image > Clipboard) and save it in Word (or whatever word processor you use).
2) Next do the same for the board.
3) Save your word processor's document as a PDF so everyone can read it
4) Upload the PDF to the Files section on TekScopes
I can do that easily enough, and I could also possibly (which nobody has mentioned) simply redesign it in KiCad (I'd have to work on that a bit) which has no license restrictions.

#2 Solution: Reimburse you from the TekScopes account:
1) For the people who cannot send you a SASE send them two of your boards and keep track of what you spend to do this.
2) After 1 month notify everyone this is their last chance to get your boards
3) Wait another week for the last requests for your boards to arrive then send me the amount you spent on postage and I will reimburse you from donations to the TekScopes account.
I have only one person who has difficulty getting a SASE to me, and that can be solved.  If people from outside the US want boards, then if they email me, we can work something out, one way or another.

The people in the US who have wanted boards have been able to send an SASE, so the entire effort has been a bit of cardboard, some blue masking tape, and then putting the result in the mailbox.  It's not a problem.  I don't feel the need to have Tekscopes reimburse me, but I do thank you for the generous offer.

Harvey


Vince Vielhaber
 

There are still boards left? I contacted Harvey but didn't get a response so I figured they were gone.

Vince - K8ZW.

On 04/13/2021 09:23 AM, Dennis Tillman W7pF wrote:
Hi Harvey,
Thank you for making the 5CT1N / 7CT1N Adapter available to the members of TekScopes. That is very generous.
For at least the past 5 years I have been creating prototypes of a dual transistor adapter but until about 2 weeks ago I was never satisfied with the results.
I compliment you on the absolute simplicity of your design. I cannot imagine that anyone could make it simpler. My solution looks more like an actual Tek designed adapter.

As you have discovered by now even something as simple as giving away your PC boards for free gets complicated by reality.
I think I can solve this dilemma for you. I propose two possible solutions:
#1 Solution: Make a PDF available of what you designed that anyone else can use as a guide to make their own PCBs. You will not be violating the Eagle license by sharing your schematic and board layout in a PDF since there are no Gerber files involved.
1) Make a copy of the schematic (In Eagle the sequence is: File > Export > Image > Clipboard) and save it in Word (or whatever word processor you use).
2) Next do the same for the board.
3) Save your word processor's document as a PDF so everyone can read it
4) Upload the PDF to the Files section on TekScopes

#2 Solution: Reimburse you from the TekScopes account:
1) For the people who cannot send you a SASE send them two of your boards and keep track of what you spend to do this.
2) After 1 month notify everyone this is their last chance to get your boards
3) Wait another week for the last requests for your boards to arrive then send me the amount you spent on postage and I will reimburse you from donations to the TekScopes account.


Harvey White
 

Yep, send me a private email and I'll reply with an address, send me an SASE and I'll send you a pair.

Harvey

On 4/13/2021 1:13 PM, Vince Vielhaber wrote:
There are still boards left?  I contacted Harvey but didn't get a response so I figured they were gone.

Vince - K8ZW.

On 04/13/2021 09:23 AM, Dennis Tillman W7pF wrote:
Hi Harvey,
Thank you for making the 5CT1N / 7CT1N Adapter available to the members of TekScopes. That is very generous.
For at least the past 5 years I have been creating prototypes of a dual transistor adapter but until about 2 weeks ago I was never satisfied with the results.
I compliment you on the absolute simplicity of your design. I cannot imagine that anyone could make it simpler. My solution looks more like an actual Tek designed adapter.

As you have discovered by now even something as simple as giving away your PC boards for free gets complicated by reality.
I think I can solve this dilemma for you. I propose two possible solutions:
#1 Solution: Make a PDF available of what you designed that anyone else can use as a guide to make their own PCBs. You will not be violating the Eagle license by sharing your schematic and board layout in a PDF since there are no Gerber files involved.
1) Make a copy of the schematic (In Eagle the sequence is: File > Export > Image > Clipboard) and save it in Word (or whatever word processor you use).
2) Next do the same for the board.
3) Save your word processor's document as a PDF so everyone can read it
4) Upload the PDF to the Files section on TekScopes

#2 Solution: Reimburse you from the TekScopes account:
1) For the people who cannot send you a SASE send them two of your boards and keep track of what you spend to do this.
2) After 1 month notify everyone this is their last chance to get your boards
3) Wait another week for the last requests for your boards to arrive then send me the amount you spent on postage and I will reimburse you from donations to the TekScopes account.


Vince Vielhaber
 

Sent. Let me know if you didn't get it.

Vince - K8ZW.

On 04/13/2021 02:41 PM, Harvey White wrote:
Yep, send me a private email and I'll reply with an address, send me an
SASE and I'll send you a pair.

Harvey


On 4/13/2021 1:13 PM, Vince Vielhaber wrote:
There are still boards left? I contacted Harvey but didn't get a
response so I figured they were gone.

Vince - K8ZW.

On 04/13/2021 09:23 AM, Dennis Tillman W7pF wrote:
Hi Harvey,
Thank you for making the 5CT1N / 7CT1N Adapter available to the
members of TekScopes. That is very generous.
For at least the past 5 years I have been creating prototypes of a
dual transistor adapter but until about 2 weeks ago I was never
satisfied with the results.
I compliment you on the absolute simplicity of your design. I cannot
imagine that anyone could make it simpler. My solution looks more
like an actual Tek designed adapter.

As you have discovered by now even something as simple as giving away
your PC boards for free gets complicated by reality.
I think I can solve this dilemma for you. I propose two possible
solutions:
#1 Solution: Make a PDF available of what you designed that anyone
else can use as a guide to make their own PCBs. You will not be
violating the Eagle license by sharing your schematic and board
layout in a PDF since there are no Gerber files involved.
1) Make a copy of the schematic (In Eagle the sequence is: File >
Export > Image > Clipboard) and save it in Word (or whatever word
processor you use).
2) Next do the same for the board.
3) Save your word processor's document as a PDF so everyone can read it
4) Upload the PDF to the Files section on TekScopes

#2 Solution: Reimburse you from the TekScopes account:
1) For the people who cannot send you a SASE send them two of your
boards and keep track of what you spend to do this.
2) After 1 month notify everyone this is their last chance to get
your boards
3) Wait another week for the last requests for your boards to arrive
then send me the amount you spent on postage and I will reimburse you
from donations to the TekScopes account.



 

I just received the boards about a week ago. They're beautiful, and deceptively small, but it was obvious that they fit the 7CT1N on even the most cursory inspection.

Now I'm just waiting on the banana plugs and switch.

Thanks

-- Jeff Dutky