coil generator : tester of coils

[SkyeHi]

WM6, well done for remaining relatively calm, more than I could have managed, with this tagged on the end;
"viel erfolg mit Ihrem wunderbaren Geschaeft. Mfg"
I will have a look through an archive site containing UK and American electronic magazines. The UK ones would often copy/use articles from other magazines.

[WM6]

Boss is to lazy to prepare article scan copy, he wish to sell whole 1978 paper edition:

New message from: ce_buch (9,856)

Hallo,
der Chef sagt, dass das alles zu umstaendlich waere.
Wollen Sie nicht den Jahrgang vielleicht doch komplett kaufen?
So teuer ist er ja nicht!
Vielen Dank.
Mit freundlichen Gruessen,
Christian Mueller
CeBuch


I offered him 5 eur for the article digital scan copy now.
We'll see, if the boss changes his mind.

"sehr umfangreichen Arbeitsaufwandes" - what the ......????????

Greed would destroy this welt .... till The End:

Correspondence in a sequel:

Hallo Christian
Ich brauche volle Jahrgang nicht. Weiss nicht, was damit zu tun.
Ich bin nur in digitale scan copy of dieses Artikel interesiert:
1978 Funkschau #18 :
"LC-Oszillator fuer beliebige LC-Verhaeltnisse" 78/18/898
Ich bin bereit fuer genannte Artikel, 5 Euro auf Ihr Paypal-Konto zu ueberweisen.
Wenn Sie damit einverstanden sind, teilen Sie mir Ihr PayPal-Konto (E-Mail) mit.
Das bedeuted, kein Papier, keine Post Sendung, nur digitale scan copy auf mein
E-Mail gesendet und das ganze Jahrgang bleibt bei Ihr intakt.
Hoffe nicht zu umstandlich. Vielen Dank.
MfG
Jakob


Hallo,
ja, klar. Ich verstehe. Da muss ich den Chef fragen. Vielen Dank.
Mit freundlichen Gruessen,
Christian Mueller
CeBuch


Hallo,
aufgrund des doch sehr umfangreichen Arbeitsaufwandes, muessten wir Ihnen 10,00 EUR in Rechnung stellen.
Mit freundlichen Gruessen
Im Auftrag Jana Gottwald
CeBuch


Hallo Jana
Vielen Dank fuer freundlicher Antwort.
Muss sagen dass ich habe keine Interesse mehr.
Ich wuensche Ihnen viel Erfolg mit Ihrem wunderbaren Geschaeft.
Mfg
Jakob

Boss and greed always win!
Or probably she has no idea how to make digital scan copy?

"sehr umfangreichen Arbeitsaufwandes" (very extensive workload) ???? For simple digital scan copy??? Jesus Christ !!!!!!

[WM6]

Asking him for article copy (in German), wiling to buy it, but no answer from him till yet.

Seems he is in large book commission business, so very busy. We will see.

Boss is to lazy to prepare article scan copy, he wish to sell whole 1978 paper edition:

New message from: ce_buch (9,856)

Hallo,

der Chef sagt, dass das alles zu umstaendlich waere.
Wollen Sie nicht den Jahrgang vielleicht doch komplett kaufen?
So teuer ist er ja nicht!
Vielen Dank.

Mit freundlichen Gruessen,

Christian Mueller
CeBuch


I offered him 5 eur for the article digital scan copy now.
We'll see, if the boss changes his mind.

[kt315]

this guy bought all boards from me. interesting story he told.

Sir,



I just received your email address through the eBay messaging system. Normally, eBay does not allow buyers and sellers to exchange email addresses. How did you do it?




You were kind enough to offer me the Gerber files of the LC board which I purchased three of from you.




I recently obtained a number of very accurate (PET) non-inductive capacitors which were all measured very carefully at better than 0.002% (@ 23?C) at a lab with traceability back to NIST.




All of these "standard" capacitors are nominally in the 2.2 uf range.




At my bench I have the ability to measure RF Frequencies very accurately down to fractions of a Hz with a GPS based master oscillator and my collection of old HP counters, generators, and spectrum analyzers.




I'm hoping to use your LC circuit, mounted in a temperature controlled box, with very rigid mountings, and very rigid test terminals, to create a series of "secondary" test inductors over a range of rigid, open "Air Dux" coil stock, and use those stable inductors to expand my range of of calibrated (PET) non-inductive capacitors.




These test capacitors and inductors, in a stable temperature environment, with your LC Oscillator board, should allow me to determine component values more accurately than my DE-5000 LCR meter to at least another decimal place.




As I suspect that this will be a long term project, and I will rebuild my test fixture more than once, it will be nice to have extra PC boards so I don't have to take apart the older test fixtures.




It will be nice to have the Gerber files so I could simply order more boards as I develop this project and make modifications in the input circuit to minimize the errors in my homemade component test fixtures.




Thank you again for your kindness.




Mike

[WM6]

eBay guy answered.

I am in communication with him now.

[kt315]

he sent me the pic...(i mean ebay listing) with cold german nature of Nordid Corded... he certainly did the pic in perspective.
yes, now i see it is primary source.

[kt315]

this reply from address you gave above.

Sehr geehrte Kundin,
sehr geehrter Kunde,

vielen Dank f?r Ihre E-Mail, wir werden Ihre Anfrage zeitnah bearbeiten.
Sollten R?ckfragen auftreten, werden wir mit Ihnen in Kontakt treten.

Weitere Informationen zu unseren Fachzeitschriften, Online-Angeboten, Events und Mediadaten finden Sie auf unserer Homepage:

https://www.weka-fachmedien.de

Mit freundlichen Gr??en
Ihr
Abonnement-Service WEKA FACHMEDIEN

Vertriebsbeauftragte
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70597 Stuttgart

Telefon: +49 (0)711 72 52-210
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E-Mail: [email protected]

Gesch?ftsf?hrer: Joachim John, Michael Staudenmaier
Sitz und Registergericht: Stuttgart HRB 10156

[WM6]

. can anybody with clear German ask this German guy to attach a pic with the page in PM?

Asking him for article copy (in German), wiling to buy it, but no answer from him till yet.

Seems he is in large book commission business, so very busy. We will see.

[kt315]

now SOS-HELP from mine side. can anybody with clear German ask this German guy to attach a pic with the page in PM?
PM in ebay is allowed to attach pictures, but not links. links are banned.
main difficulty this guy is not so active, we know that those nordic folks sometimes are too 'frozen, slow-witted' on a reaction be cause they are living
under 'the cold Sun', northern Sun.
so still no reply from him. thank you guys.

[WM6]

If whole year 1978 volume is 20 euro, then August issue only should be about 1 euro + shipping.

Does they sell single (august #18 ) copy too, or whole 1978 volume only?

[kt315]

thank you WM. in PM asking this guy to send me pic with the article. he attached this pic of the cover.
his listing https://www.ebay.com/itm/303387485435?ul_noapp=true

[WM6]

i believe if in russian magazine this is reprint from it then original article was in american one.

.

It was Deutsche Zeitschrift not American one.

Funkschau (FRG), 1978, 18

(FRG = Federal Republic Germany)

There are different magazine archives in Germany.

You can contact them and ask for copy of 1978 Funkschau article named:

"LC-Oszillator fuer beliebige LC-Verhaeltnisse" 78/18/898

Par example here:

https://shop.weka-fachmedien.de/de/content/4-rueckfragen

[kt315]

can anybody share this magazine Funkschau 1978 N18? i believe if in russian magazine this is reprint from it then
original article was in american one. ie the source is american magazine be cause those BC... BF transistor types
and 1N4148 diodes sure say that the schematic was taken from western side or as we say US is 'new Atlantis'.

[kt315]

ultra-precision soviet cap K71-7. 0.01uF 0.5%, good for research tester.

https://www.ebay.com/itm/0-01uF-250V-0-5-K71-7-Polystyrene-capacitors-Lot-of-20-/261456722733

[kt315]

BH coil, example of calculation. frequency 6.6kHz.

Yes, there is an internal capacitor. The TX inductance is 2.4 mH, and there is a parallel pair of ( 220 nF + 22 nF or 20 nF ) = 240 nF across it. I'm not sure of the capacitor type, the 22 nF was a common polyester type, the 'dipped mylar' that are usually green colour. The 220n may also be polyester, but polypropylene may be a possibility, for temperature stability?
RX inductance is also 2.4 mH, with no added C,R,etc. RX resistance is quite low, 2 Ohms.

L=2422.932 uH