[Hallicrafters] SR-2000 Hurricane delay tube

[James Liles]

Hi Richy:

The 12NO90T 9 pin was used however a 12NO90 octal was used in the early 
PS-2000's.  The Hallicrafters guys missed the fact that when using 8122's in 
the parallel configuration, a delay of 180 seconds is recommended and when 
using 12.6 volts for the filaments rather than 13.5 volts as in the SR-2000, 
180 seconds is an imperative.  The 12NO90 octal can be retrofitted but if 
you do that use a 12NO180 octal.

Only about 24 12NO180T nine pin relays were ever manufactured by Amperex and 
they stated that they would not repeat the contract.

We have used the 115NO90T at times --- no problem, simply use 115V for the 
heater.  The 12NO90T sells for about $80.00 and the 12NO90 or 12NO180 octal 
relays for about $15.00.  Guess you know which way I'd go unless the
owner was fussy about the historic value.

I have any of the above tubes and will discount them handily if you are 
planning to keep the radio, not just sell it for profit.  I have but a few 
of the 12NO180T tubes and would prefer to keep them.

Kindest regards Jim K9AXN



Message: 2
Date: Fri, 18 Feb 2011 22:24:41 -0500
From: ss409ss at aol.com
Subject: [Hallicrafters] Hurricane delay tube
To: Hallicrafters at mailman.qth.net
Message-ID: <8CD9DFBAE7D62C6-84C-2F067 at webmail-m040.sysops.aol.com>
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   Does anyone know what the type of 90 second delay tube was used in the 
power supply? The original was bypassed and there is no part number listed 
in the manual besides the original part number.. Tnx Richy