© COPYRIGHT NOTICE  All Rights Reserved

TYPE 27 Page
(Last updated: 29-Mär-2012 16:32 )

Overview of  "Type 27" family   (not complete)
27 Solid plate tube
227 Globe tube.  Seen normally as mesh plates so far.   Equivalent to 27
327 Globe tube.  Seen normally as mesh plates so far.   Equivalent to 27

night view RCA 227
(click on image!)

day-view RCA 227

Dated Sept 1932
(click on image!)
 I have started this special "27" page  to put some more attention to this nice tube.   It is available in several optical versions that are all electrically equivalent to each other.  It was designed as a pre-amp or driver tube for Audio amplifiers.

Unfortunally many of the offered tubes on the free market are in very bad condition. There is only small supply of good NOS tubes, because most of what is offered are gassy tubes.  These test good on a simple version tube tester, but you will see a blue cloud inside, when they are put under maximum power. Such tubes will die very soon when you start to use them, because the gas will kill the cathode when it is ionized (and lighting up from this)

I will try to get togther a choice of good, tested 27's available here. Tubes that you can trust upon to work good! 

Attention: This is an export Price List, valid for companies in the European Community with a VAT Identification number, and for companies or private persons outside the European Community.    Inside Europe,  please ask for a quote, including 19% VAT tax.

Tube
 
 Item
Nr
Prices are for one tube
 Condition
Qty.
EURO

27
Ken-Rad
7
Top quality tubes, with large silver flash getter. These look RCA made. Test 100%.
NOS
2
25,-
227
 Cunningham
 1
Tubes look like above.  Inside sytem, glass and socket  are identical for each pair.  Test 100%.   Mesh tubes.
Used
4
37,-
 227
 NU
2
 Tubes look like above.  Inside sytem, glass and socket  are identical for each pair.  Test 100%.   Mesh tubes.
Used
4
37,-
 227
Philco 
3
 Tubes look like above.  Inside sytem, glass and socket  are identical for each pair.  Test 100%.   Mesh tubes.
Used
4
 37,-
 227
Arcturus
4

Original Acrturus BLUE Glass, mesh 227. Test 100%. Mesh tubes. Sorry for the price but you'll never find this again

Used
6
190,-

 
 
© COPYRIGHT NOTICE  All Rights Reserved.