Unbenanntes Dokument

 The E188CC = 7308 has been the free tradable version of the CCa, which is produced only for telecom applications. Same selection, quality grade and long life version. Frame grid, trimica, silver or grey shield versions were produced in the 1960's, all made by Siemens, 1970's versions by Mullard (RTC) r-coded with silver shilded nontrimica. Those versions are from the 70's. Similar constructions exists on E88CC, PCC88 PCC189 and ECC189 technical layout.

Your bid is on
a pair (2 tubes ) of

NOS original Siemens Halske from
* Siemens Production *

* E188CC (7308) = CCa *
(Siemens Halske (SH) labeled)

perfect E88CC - ECC88 - 6922 replacement

German production of the late 60's !!
perfect tubes, original Siemens Halske version!

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near NOS , slightly used tubes, all emission & values are in good - very good working order!

measured on my Neuberger 370 Tube Analyzer:
@ 90Va -1,2Vg 6,3Vh (100%Ie= 15 mA)

nos shorts, no gas !

Both  tubes > 13 mA,
- you see what you get -


all have serials on inner metal leaf :  G3 8B

logo's and prints as shown,
pls. see my detailed photo's

 

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In case of actuality:
I give no guarantee on measurements,
microphonic behaviour or  or different values listened,
measured on other tube testers or analysers.
Just in case of mismatch of "standard" values of
the different tube testers "standards":  my measurements
refer to tube data sheets shown by the ancient tube producers.
(You'll find them easily on the net.)
This is a private sale, no guarantee, no returns.

Please refere to my TOP ebay ratings - I'll sell no rubbish!
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I shipp worldwide ! 

US by registered airmail 25$, Europe 15,- €. 

Asia Pacific 29 USD,

varies -  by express airmail (with insurance)
- please ask !!

Shipping within 3 working days - good communication guaranteed!