Big clearance!

So… I started work now on the garage and that’s where all the valves are. I’ve been swaying for weeks now between just concentrating on CVs and also other British military types. And I’ve come to a decision, finally. My collecting interests have for some time now been just CV types but I have also kept bits going where I have collected 1Bxx, RELxx, and Ax/Nx/Vx British types, and all sorts of other bits and  bats.

I am now only collecting CV types – and by that I mean they must actually be CV marked – and will be selling off / giving away everything else. So if anything takes your fancy let me know. Pity shipping costs are so expensive these days… but then some of the stuff I have is rare so many well be worth it.

This will cut the collection considerably but will also help fund my other hobbies! I got to about 3,000 valves at one stage, currently there are just over 1,800 individual valves (plus a few duplicates), and just under 1,300 individual CV types in the collection. I will be culling many of the CV semiconductors too – I went a little mad there!

One other change is I am no longer cataloguing non-CV names, i.e. where a valve is dual marked. There are a number of these in the database which will slowly be weeded out once things are cut down. There are loads of data sources out there and the CV Registers show equivalents, so no actual loss of data. It just makes more sense to me to do it this way.

(Edit: note that some valves were donated and in such cases these will be donated suitably elsewhere)

Not a CV2429…

Here apparently is a CV2429, clearly marked on the valve which appears to have a glass tube surrounding the rod coming from the top connection going into a metal cylinder. I thought this was quite interesting when I received it, but a CV2429 is supposed to be a TR tube and looks nothing remotely like this guy!

And finally…

I can’t believe I’ve not updated this site since last year! Well I now have 4 boxes of CV valves to sort out, including a CV2, my lowest number. A lot of valves have left the workshop – basically for free as there is so little interest and as I said before I am no longer engaging with eBay (the money is not worth the hassle). 8 large boxes of them and several smaller boxes filled a car. There are a lot left which will be listed here under Sales at some time and what does not sell will go to auction. If you see anything on the site that is definitely not CV marked then it will b for sale, except a few cases. I am even considering letting the REL valves and the 1B series go now. Most of the Germans are sold or are spoken for as are one or two of the Russian radar CRT-types. Anyway, none of those are listed as exhibits now.

An actual update! And more potential disposals.

After 8.5 years of study, including several breaks on medical grounds, and a final mad dash since last friday I finally found out today I am on the pass list and will graduate with a Ph.D. in law next month. That’s the single most intensive thing taking up all my time these past years. Well, that and the kids!

So, I finally have some time to turn my attention to my greatly ignored valve collection. And I have come to a decision. I’ve been swinging between wanting to sell the whole collection and wanting to keep on expanding it. In fits and starts I pulled out a lot of non-CV and non-military valves, many of which went on eBay until their Global Shredding Programme messed things up and I quit.

But in order to further trim the collection I have decided to strip out everything that is not actually CV marked, bar a few specials like the RELs and some of the 1B series. So, up for grabs will be all the UK military stuff that is not CV marked. Bearing in mind eBay is not really an option now I am open to offers on any or all. Do get in touch if you are interested in any.

There are a few oddments which are not up for grabs, like the parametric amplifier tube, and the REL stuff as I mentioned. But equally there is some very interesting, and in some cases old stuff in the collection which will be available.

I’ve no idea if anyone even reads these posts and so I will also be offering some around where I know there is interest. So be quick!

Updates, or lack thereof

I’ve not updated the collection for ages. There is a CV magnetron sat on my desk waiting for me to take pics, as well as a couple of fuze valves that people kindly sent me. Being realistic I am not going to get close until October this year because I am trying to complete the corrections to my Ph.D. and running out of time. So everything is on hold.

I also have 4 boxes of CV valves 300 miles away waiting for transport. uShip came up empty with really stupid prices so these may end up going by courier or me meeting halfway. Time is against me.

I also have half the workshop full of valves for disposal. Since I gave up with eBay and PayPal moving these has become difficult. That plus the complete lack of time anyway. I hope to go to a sale later this year which will hopefully reduce the stock somewhat. Some are ex-collection but most are mundane valves.

Haltron CV8067

I just added a CV8067 to the site. This is one of a number of Haltron valves I have noticed recently on eBay where the valve just carries the CV number. All those I have noticed are in the CV8xxx range.

Now K1001 does permit this but specifically when it is “impractical, on account of physical limitations” – see here (pdf) section 4.1.4. It is hard to see how a valve such as this example could not carry the full CV information. On on a subminiature valve, but not here.

The valve came in a Haltron box with no markings, and a label attached giving the CV and NSN numbers.

Looking at the valve the printing is slightly different too, as if the original Haltron marking is the original and the CV number added later. There is no obvious evidence of the civilian part number being removed, but of course it may just have been cleaned off sufficiently well as to leave no trace.


Another little sequence completed – I now have all four magnetrons from CV1475 to CV1478. These are four frequency variants and successors to CV69A-D.

I have CV69A and D too, so now need CV69B and CV69C to complete that set.

There are two other sets of four – CV1479-82 which I have already and are CV76A-D (I have CV76B and C, so need A and D, and CV1483 to 87 which are CV99A-D. I am missing CV1483, and CV99B and D.


CV1931 update

For some time I had a CV1931 on the website, the example being a 6H6 metal double diode, though not 6H6 marked. Today I got a glass CV1931, also marked 6H6GT. I never checked before but the metal one is clearly incorrectly marked.

The CV Register has three CVs in a  series: CV1929 / 6H6G, CV1930 / 6H6 and CV1931 / 6H6GT. This makes sense.

For now I’ve left the page as-was but added the glass valve.


Removed valves

I have been trimming the collection for some time now and disposing of valves which helps maintain this virtual museum and also reduces the amount of storage space needed. It also helped me finally focus on what I want to collect, rather than just anything and everything.

But someone mentioned to me a whole back that people may still want to see these. As the main pages only display what I actually own, once removed a valve’s web page is removed too.

So I have been making PDFs of the more unusual valves as I remove them and these are now held at – it is simply an automatically generated list of PDF documents, each one of which is basically the valve page saved as a PDF via Safari.