One other thing I failed to mention about your situation, is that people will suggest that you use the CRT out of a 465 or 475 in your 2235.
Will this CRT swap work, Yes... Is it a decent substitution, NO!
This CRT swap is a large step backwards in my opinion, and I have done it.
tom jobe...
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On 6/19/2018 6:05 PM, tom wrote:
Hi George,
That CRT is not all that rare as it came in many models of the 22xx series.
A few common models that also used it are the 2213A, 2215A as well as your 2235 and the 2236.
You can download free manuals of lower quality for many of the 22xx scopes, to see what part number they used.
The CRT uses a component number such as V9870 and may appear with the A6 parts in the listings, or at the end of the electrical parts listings.
As I remember... the CRT for the 2235A and the 2236A is part number 154-0861-10, which seems close enough, but the HV lead to the CRT is enough shorter that it will not work without an HV extender of some sort. They re-arranged the HV multiplier setup on the mainboard of the 2235A and the 2236A to use a shorter HV lead.
You want a -00 CRT for your 2235.
Other scopes that seem like they should use the same CRT part number are the plain 2213 and 2215, but they are both much different.
There are lots of "parts only" scopes for sale on eBay and elsewhere, and you can often buy one of them for not much money, especially if it is located close enough to you to avoid the shipping charges.
I think Sphere in Canada sells that CRT for about $85 plus shipping when they have them in stock, to give you some idea of it's fair worth in US dollars.
The 2235 is a fine scope, and the easiest to work on of all the Tektronix gear I have ever encountered.
It and its peers (from 2213A to 2236) were made in such large numbers that there is a substantial body of knowledge about it, what it's common old age ailments are, etc, etc.
tom jobe...
On 6/19/2018 9:27 AM, georgeK KB1HFT wrote:
I understand that the Tek2235 wants a 154-0861-00 CRT, which seems to be made of Unobtanium.
Are there any known substitutions?
Are there any _available_ known Substitutions?
Thanks in advance!
73
-georgeK KB1HFT
