On the subject of knobs.

If you have a dead/cracked knob, or access to a lathe, you can get the insert.? Aluminum will work equally well.? They knurled the knob insert.

Print the knob so that the center hole is very slightly smaller than the insert, but only by, say 10 thousandths.

Since the plastic has a relatively low melting point, all you need to do is to orient it properly (or not, you can thread the insert once put in).? Heat the insert gently, and push it in.? You may want a fixture to do this to keep the centers aligned and the shaft perpendicular.

Tek molded the knob around the insert.

Harvey

No, Chuck, I'm not implying that at all. Go pick a fight somewhere else.

-Dave

On November 14, 2021 8:32:23 AM "Chuck Harris" <cfharris@...> wrote:

Are you implying that materials owned by my company,
and hence me, aren't mine?

Communism and socialism are based on that very idea.

The belief that personal ownership does not exist, but
rather people only have stewardship of their "belongings",
carries forward to the logical conclusion that people
are not the owners of their bodies and minds.

That condition is known as slavery.

-Chuck Harris


On Sat, 13 Nov 2021 20:59:30 -0500 "Dave McGuire"
<mcguire@...> wrote:

Oh, I'm very much aware. (not my first BBQ) The problem is that
people in general, but suits in particular, don't understand the
difference between "ownership" and "custodianship".

-Dave

On November 13, 2021 8:16:09 PM "Harvey White"
<madyn@...> wrote:

Suits have a different perspective.

For a suit.....

What is this asset? Does it cost too much to have? Is it
economical for us to get rid of it? If so, throw it away and claim
a tax writeoff.

They're not paid to consider the intrinsic value of that to
anybody. It doesn't contribute to how they are judged, which is
the corporate bottom line.

For a scrapper?

What are the pieces worth? What can I get for these useless cables
I've cut off, they're all copper, aren't they? Manuals? What's the
price of used paper per ton? How much gold can I get from this?

Hobbiests and engineers?

Best of luck.

Harvey


On 11/13/2021 7:06 PM, Dave McGuire wrote:

As much as those things are worth, someone trashed one? Holy
crap. I'm guessing suits.

-Dave

On November 13, 2021 3:18:27 PM "bandrsn via groups.io"
<bandrsn@...> wrote:

I rescued a nice HP 339A distortion analyzer from an e-waste bin
at work, but not before another piece of equipment was dropped in
an sheared off the 400Hz filter button cap, which was lost.
There is about 1/8 inch of the push-button switch post left
inside, behind the front panel, and the switch stills works fine
if poked with a stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off
as a sample? 3. Has anyone made a new button from a sample with
either epoxy in a mold or 3D printer? 4. Any other ideas for
button cap repair/replacement I'm missing besides buying another
339A for parts?

Thanks.
-Bruce A., Santa Barbara

--
Dave McGuire, AK4HZ
New Kensington, PA

--
Dave McGuire, AK4HZ
New Kensington, PA

--
Dave McGuire, AK4HZ
New Kensington, PA

Are you implying that materials owned by my company,
and hence me, aren't mine?

Communism and socialism are based on that very idea.

The belief that personal ownership does not exist, but
rather people only have stewardship of their "belongings",
carries forward to the logical conclusion that people
are not the owners of their bodies and minds.

That condition is known as slavery.

-Chuck Harris


On Sat, 13 Nov 2021 20:59:30 -0500 "Dave McGuire"
<mcguire@...> wrote:

Oh, I'm very much aware. (not my first BBQ) The problem is that
people in general, but suits in particular, don't understand the
difference between "ownership" and "custodianship".

-Dave

On November 13, 2021 8:16:09 PM "Harvey White"
<madyn@...> wrote:

Suits have a different perspective.

For a suit.....

What is this asset? Does it cost too much to have? Is it
economical for us to get rid of it? If so, throw it away and claim
a tax writeoff.

They're not paid to consider the intrinsic value of that to
anybody. It doesn't contribute to how they are judged, which is
the corporate bottom line.

For a scrapper?

What are the pieces worth? What can I get for these useless cables
I've cut off, they're all copper, aren't they? Manuals? What's the
price of used paper per ton? How much gold can I get from this?

Hobbiests and engineers?

Best of luck.

Harvey


On 11/13/2021 7:06 PM, Dave McGuire wrote:

As much as those things are worth, someone trashed one? Holy
crap. I'm guessing suits.

-Dave

On November 13, 2021 3:18:27 PM "bandrsn via groups.io"
<bandrsn@...> wrote:

I rescued a nice HP 339A distortion analyzer from an e-waste bin
at work, but not before another piece of equipment was dropped in
an sheared off the 400Hz filter button cap, which was lost.
There is about 1/8 inch of the push-button switch post left
inside, behind the front panel, and the switch stills works fine
if poked with a stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off
as a sample? 3. Has anyone made a new button from a sample with
either epoxy in a mold or 3D printer? 4. Any other ideas for
button cap repair/replacement I'm missing besides buying another
339A for parts?

Thanks.
-Bruce A., Santa Barbara

--
Dave McGuire, AK4HZ
New Kensington, PA

--
Dave McGuire, AK4HZ
New Kensington, PA

Of course it can be sold, but after it is depreciated,
anything you get for it is income, and as such subject
to taxes of all sorts.

Remember, companies sell scrapped depreciated equipment
all of the time.

The big question is does the company want to go to the
effort to enter the depreciated item into its books as
inventory, and to process the sale. Any sale to an
individual will (depending on the state) trigger a sales
tax... And may require the company to get a sales license,
and a sales tax license. B-to-B sales need neither in
most states.

-Chuck Harris


On Sat, 13 Nov 2021 18:38:33 -0800 "Larry McElhiney via groups.io"
<lmcelhiney@...> wrote:

On Sat, Nov 13, 2021 at 08:16 PM, Harvey White wrote:

If so, throw it away and claim a tax writeoff.

Corporations tend to depreciate expensive equipment while it is in
use?in order to take the tax write off. ?When it is fully
depreciated, it can only be scrapped or donated, not sold.
?Otherwise, IRS gets annoyed…

Larry
AC9OX

In message <[email protected]>, Larry McElhiney via
groups.io <lmcelhiney@...> writes

On Sat, Nov 13, 2021 at 08:16 PM, Harvey White wrote:

If so, throw it away and claim a tax writeoff.?

tend to depreciate expensive equipment while it is in use?in order
to take the tax write off. ?When it is fully depreciated,?
it can only be scrapped or donated, not sold. ?Otherwise, IRS gets
annoyed&hellip;

Very ecologically sound that, wonder if it was discussed at COP26?
suspect not!..

Magnus, Thanks for pointing out the right name of the suppliers a few
posts back, I reckon i too their entire supply of QTY 4 off 339A
knobs:).

Whilst on that subject those comprise of a Brass metal core and a
plastic moulding around them. Is it possible to use a 3D printer to go
over the brass metal former to "print" up a complete control knob at
all?...



--
Tony Sayer

Hi Bruce

Yes, I have the 8341A operating manual and the 8340A's four manuals w/ good scans from KO4BB website. Unfortunately, I cannot find the service volumes for the 8341A itself, but the 8340A's are very similar, hope.

The PRESET;SHIFT;MANUAL and the PRESET;SHIFT;EXT checks shows no faults at all, no one is blinking. No red fault led in the ALC board is on, also the loops are locked. That's weird, maybe only a calibration is needed to fix the problem.

What you mean when you said 'do a PEAK'? SHIFT + PEAK? or PEAK only? I do the last and power don't rise up a bit.

On band 0, non readable (low) at 10 MHz, -17 dBm @ 1 GHz, -14.3 dBm @ 2.1 GHz
On band 1, + 5.4 dBm @ 2.3 GHz, +8.9 dBm @ 5 GHz, +8 dBm @ 6.9 GHz
On band 2, -11.7 dBm @ 7 GHz, -7 dBM @ 10 GHz, +4.2 dBm @ 13 GHz
On band 3,very low (no readings on both meters) at 13,5 GHz, -11 dBM @ 15 GHz, -8.5 dBm @ 18 GHz

The only low but reasonable readings are on band 1, the others are very low.

Regards,
R.

On Sat, Nov 13, 2021 at 08:16 PM, Harvey White wrote:

If so, throw it away and claim a tax writeoff.?

Corporations tend to depreciate expensive equipment while it is in use?in order to take the tax write off. ?When it is fully depreciated,?
it can only be scrapped or donated, not sold. ?Otherwise, IRS gets annoyed…

Larry
AC9OX

开云体育

You are quite lucky.? Look at the documentation on the scope, and do not run it at high intensity because of the (relatively) limited lifetime of the Microchannel CRT.?

While there's protective circuitry to help the CRT, being conservative is not a bad idea.? I don't normally use mine, using a 7904 with the same plugins.? If I need it, though, it's there.

Harvey

Oh, I'm very much aware. (not my first BBQ) The problem is that people in general, but suits in particular, don't understand the difference between "ownership" and "custodianship".

-Dave

On November 13, 2021 8:16:09 PM "Harvey White" <madyn@...> wrote:

Suits have a different perspective.

For a suit.....

What is this asset? Does it cost too much to have? Is it economical
for us to get rid of it? If so, throw it away and claim a tax writeoff.

They're not paid to consider the intrinsic value of that to anybody. It
doesn't contribute to how they are judged, which is the corporate bottom
line.

For a scrapper?

What are the pieces worth? What can I get for these useless cables I've
cut off, they're all copper, aren't they? Manuals? What's the price of
used paper per ton? How much gold can I get from this?

Hobbiests and engineers?

Best of luck.

Harvey


On 11/13/2021 7:06 PM, Dave McGuire wrote:

As much as those things are worth, someone trashed one? Holy crap. I'm guessing suits.

-Dave

On November 13, 2021 3:18:27 PM "bandrsn via groups.io" <bandrsn@...> wrote:

I rescued a nice HP 339A distortion analyzer from an e-waste bin at work, but not before another piece of equipment was dropped in an sheared off the 400Hz filter button cap, which was lost. There is about 1/8 inch of the push-button switch post left inside, behind the front panel, and the switch stills works fine if poked with a stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off as a sample?
3. Has anyone made a new button from a sample with either epoxy in a mold or 3D printer?
4. Any other ideas for button cap repair/replacement I'm missing besides buying another 339A for parts?

Thanks.
-Bruce A., Santa Barbara

--
Dave McGuire, AK4HZ
New Kensington, PA

--
Dave McGuire, AK4HZ
New Kensington, PA

I think I have an offer for a button - thanks guys.

Continuing the e-waste saga ....

About two weeks ago, my current company was getting ready to move to new, larger quarters, and management decided to get rid of anything relatively old.
This happened to include a mint condition Tektronix 7104 with 2x 7A29, 7B15, 7B10 plugins.? I saw it sitting forlornly next to the large dumpster and after double-checking on its fate, I decided to relieve the trash haulers the effort of hoisting it up and into oblivion.? I later found the FET probes in their cases at the bottom of another pile.
Took it home and dusted it off, cleaned it up to like-new condition, and fired it up.? Works perfectly with a bright trace and no burn in.

I've since found out that this model was the fastest analog scope that Tektronix ever made, if my history is correct.
Displays very cleanly and solidly triggers past 1.3 GHz.

Go figure.
The moral - keep your eyes open when you hear of a company move or its cal lab closing down and everything there pre-1991 is suddenly "worthless".

Cheers,
Bruce A., Santa Barbara

Suits have a different perspective.

For a suit.....

What is this asset?? Does it cost too much to have?? Is it economical for us to get rid of it?? If so, throw it away and claim a tax writeoff.

They're not paid to consider the intrinsic value of that to anybody.? It doesn't contribute to how they are judged, which is the corporate bottom line.

For a scrapper?

What are the pieces worth?? What can I get for these useless cables I've cut off, they're all copper, aren't they?? Manuals? What's the price of used paper per ton?? How much gold can I get from this?

Hobbiests and engineers?

Best of luck.

Harvey

As much as those things are worth, someone trashed one? Holy crap. I'm guessing suits.

-Dave

On November 13, 2021 3:18:27 PM "bandrsn via groups.io" <bandrsn@...> wrote:

I rescued a nice HP 339A distortion analyzer from an e-waste bin at work, but not before another piece of equipment was dropped in an sheared off the 400Hz filter button cap, which was lost. There is about 1/8 inch of the push-button switch post left inside, behind the front panel, and the switch stills works fine if poked with a stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off as a sample?
3. Has anyone made a new button from a sample with either epoxy in a mold or 3D printer?
4. Any other ideas for button cap repair/replacement I'm missing besides buying another 339A for parts?

Thanks.
-Bruce A., Santa Barbara

--
Dave McGuire, AK4HZ
New Kensington, PA

开云体育

Good Day,

close - it is Walter and Susan in BC, Canada and their company is named Sphere... "The Sphere Research Canadian Test Equipment Site"
These are good people. The knobs you are looking for are currently not listed:

Always worth a look:

But may I suggest that you send a kind email to walter2 -at- sphere.bc.ca and see if can source any for you...

Cheers,

Magnus

In message <[email protected]>, bandrsn via
groups.io <bandrsn@...> writes

I rescued a nice HP 339A distortion analyzer from an e-waste bin at
work, but not before another piece of equipment was dropped in an
sheared off the 400Hz filter button cap, which was lost.? There is
about 1/8 inch of the push-button switch post left inside, behind
the front panel, and the switch stills works fine if poked with a
stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off
as a sample?
3. Has anyone made a new button from a sample with either epoxy in
a mold or 3D printer?
4. Any other ideas for button cap repair/replacement I'm missing
besides buying another 339A for parts?

Thanks.
-Bruce A., Santa Barbara

Bruce..

*Knobs for 339A's are worse than hens teeth and rocking horse muck!.

If you can mould one or get someone with a 3D printer that will be your
best bet.

Seems such a shame to get one to scrap, they are an excellent unit:-)

As to the Oik who dropped the other gear on it, Lynch him!!!


* I did get a few off a supplier in Canada, Scheer or sounds like that
she there did have a few if you or anyone else can find who that may be
they do advertise on the group sometimes might be worth asking!..
--
Tony Sayer

I rescued a nice HP 339A distortion analyzer from an e-waste bin at work, but not before another piece of equipment was dropped in an sheared off the 400Hz filter button cap, which was lost.? There is about 1/8 inch of the push-button switch post left inside, behind the front panel, and the switch stills works fine if poked with a stick, but looks bad.

Questions:
1. Is there any source for the grey cap nowadays?
2. Could a remaining button cap next to it be pulled straight off as a sample?
3. Has anyone made a new button from a sample with either epoxy in a mold or 3D printer?
4. Any other ideas for button cap repair/replacement I'm missing besides buying another 339A for parts?

Thanks.
-Bruce A., Santa Barbara

I did not.? I'm in the middle of refreshing a Pioneer cassette deck now.? I'll put it back on the bench after that and check it out.

Two more tests to ty on your 8341:

1)PRESET;SHIFT;MANUAL
2)PRESET;SHIFT;EXT

MANUAL and EXT are in the trigger section of the front panel - anything that is blinking indicates a problem.

Question - have you downloaded the user and service manuals for th 8341 that match your unit - they are delightful bed time reading.
Cheers!

Bruce

Quoting RubenRubio <rubenrb2019@...>:

OK, the results look low but reasonable. The modulator (rf output controller) seems to be working properly. The output seems a bit low - I would expect 15-20dBm (at least that is what I get on a typical 8340a/b)

Could be the unleveled power adjustments would fix that. Try the peak function at 5 GHz and see if that increases the power output.

What is the unleveled power output on the other bands? [PRESET,CW=low/midband frequency),SHIFT METER. Do this on each of the bands - highest power would be expected near the low end of the band. Doing a PEAK before the SHIFT METER might increase the power output.

It would be best to see what can be done to ge the unleveled power up before trying much else. You may have to do the SRD ias and YTF tracking adjustments to do this and that will require at least a good detector, a reasonable scope, a voltmeter capable of 5 digits, and desirably a working spectrum analyzer 8566 is a good choice, there are others.

Your power meter and sensor should be OK if they are reasonably within calibration. (Use the CAL function on the 436)

Cheers!

Bruce



Quoting RubenRubio <rubenrb2019@...>:

PD: forgot to mention the data on the table were obtained at 5 GHz, inside the 'best behavior band' 2.3 to 7 gig. Maybe I need to test at other frequencies, but the starting power level is lower and my sensor only reach -30 dBm.

I have a HP 410B Probe assembly for sale. It is complete (including the AC probe) The DC probe handles can use some TLC.

Best offer takes.

Please PM me.