Insist on genuine Mullard Valves inside your PC. Help Page for the British Wireless Database
Listing radio sets by makers, using a total of different devices matched against cross-references. Press the Stats button above for more details. Don't see the set you were looking for? Try the Gallery - http://www.classaxe.com/wireless/data/sets/.
BVWS Member: Click to visit the BVWS web site
Contents:
How to List Radio Sets
Interpreting List Radio Set Results
How to List Devices
Interpreting List Devices  Results
Off-Line Mode
Performance Figures
Other Search Engines
Future Plans
Contacting the Author
---
How to Choose Radio Sets:
You can list all radios in this database by pressing the List Radios button K, or enter additional details to filter results.
View of the Choose Radio Sets section of the selection form.
A Maker: List sets by a specific maker from the list box.  Select (All Makers) if you don't care.
B Model: List sets whose "Model" name contains your value.
Click for an example Type Minor to list all sets where model includes the word "Minor".
C Device: List sets containing a particular device. You can use "Wild Cards" in your searches:
? means one unknown character;
* means zero or more unknown characters;
| is used to separate multiple alternatives ("OR").
+ is used to separate multiple requisites ("AND")
Devices shown in brackets indicate a range of possibilities for the preceding device.
Click for an example Type P??45* to list sets with PEN45 or PEN45DD (highlighted).
Click for an example 6V6|6V6G|6V6GT lists sets using any of those valves - (or try 6V6*).
Click for an example ?CC85+?CH81+?F89+?ABC80+?L84 lists sets using ALL of those valve types.
D Power: List sets powered by For sets operating from AC,For sets operating from DC,For sets operating from Batteries or For Car Radios.   Select Ignore the power supply if you don't care.
E FM (VHF) List sets with / without an FM/VHF waveband option y, without option n, or option - if you don't care.
F Gramophone List sets with / without a record player
G Tuning Indicator, also known as "Magic Eye" List sets with / without a "Magic Eye" tuning indicator
H Built-in Clock List sets with / without a built-in clock 
I Choose Columns causes a window to open which allows you to choose which columns you display next time you execute a search.    This setting is remembered for the remainder of your session.
J Press the Clear button to clear the List Sets section of the form.

---
Interpreting List Radio Sets Results: (shows output with default column selection)
Make: Model: Date: Price: Bands: IF: Devices (click for details) Number of Devices: Sort by this column Photo Available
Marconiphone ARG46A 1955-56   3 10.MHz + 470KHz ECC85, (B719), ECH81, (X719), EF85, (W719), EABC80, (DH719), EL84, (N709), EZ80 6 AC mainsDC mains(Not for use with batteries)(Not designed for in-car use)FM Waveband(No Tuning Indicator)(No Clock)Auto Gramophone3  
Marconiphone T73DAB 1959-60   2 470KHz DK96, DF96, DAF96, DL96, MR: 5 AC mainsDC mainsBattery  
Marconiphone 262 1934   2 125KHz MS4B, VMS4, MH4, MPT4, U12 5 AC mains Photo Available
DETAILS: To see full details of any set listed, click on the model name - try one of the examples above. To see a photo for any set with one, click on its camera icon - please note that some sets have several photos; in order to preview the full range for such sets, you will need to open the details view for the set.
SORTING: Search results can be sorted by column when the column heading is clicked, if the column heading is underlined. This works faster with fewer results, so try to narrow down on your initial search first. If you wanted to sort the Radio Set List results by manufacturer and by date, first sort by date, then sort again by manufacturer.
DEVICES: Most sets list the devices (valves, transistors, diodes, barretters etc) they use. Any device shown in brackets indicates a substitute for that which immediately precedes it. Detailed information on a device is obtained by clicking on the device - again, try the examples shown above. From the popup Device Details window you will be able to obtain a list of names of every radio set in the database using that device - often useful for helping you track down an example of a particular device for test purposes.
IF: Most sets built before 1930 were of a TRF (Tuned Radio Frequency) design, and simply amplified any required radio signal exactly as it was before turning the signal back into audio. After 1930 sets were of a Superheterodyne ('Superhet') design, that is, the required station was converted to a second Intermediate Frequency before being amplified.  This gave much more consistent results across the waveband. FM radio sets typically used two IFs for FM signals but only the lower one for AM reception. Under the Copenhagen Plan of 1950, IFs were largely standardised at 470KHz and 10.7MHz.
PRICES: Before 1971 all prices in Britain were listed in Pounds (), Shillings (s), and Pence (d). When you view Details on any given set, the price is converted to metric for you. To convert between old prices and the Metric system in use from 1971, the following conversion rates should be applied: 1=20s=240d. Prices were also sometimes given in Guineas, where 1GN=1+1s.
TAX: Most radio sets sold after September 1940 are shown with '+T' appended to the price, indicating that the price does NOT include Purchase Tax, which was levied at the rates shown in the table to the right.

Since the rates for Purchase Tax changed sometimes on a monthly basis, the Sort function for Price does not take account of the Purchase Tax where not already included.
21/10/1940 ??/04/1948 33.3%
??/04/1948 15/06/1948 66.6%
16/06/1948 09/04/1951 33.3%
10/04/1951 ??/04/1953 66.6%
??/04/1953 ??/10/1955 50%
??/10/1955 ??/04/1959 60%
??/04/1959 ??/04/1973 50%

---
How To List Devices
This database presently contains devices. You can list them all by pressing the List Devices button, E, or enter additional details first to reduce the number of sets returned by the database.
View of the Choose Devices section of the selection form.
A Device: List a particular device, or use wild cards and the | symbol ("OR") as described before to include a range of devices - "AND" wouldn't make a lot of sense in this context.
B Type: List only devices of a particular type, for instance, show only devices containing one or more Triodes inside them. Select "(All Types)" if you don't care.
C Base: List only devices with a specified base, for example International Octal will show only devices with an International Octal base.
D To return to listing all devices again, press the Clear button to reset the search criteria.

---
Interpreting List Devices Results:
Device: Refs Maker Type: Base: Fv Fc Notes Diagram Available Photo Available No.
EABC80 RVG2:23 MUL,EUR 2,2,2,3 B9A 6.3 0.45 Triple-Diode Triode Diagram Available Photo Available 208
EBC33 RVG1:26 MUL,TUN 2,2,3 IO 6.3 0.2 Double-diode Triode Diagram Available Photo Available 129
UY41 RVG1:21 MUL,TUN 2 B8A 31 0.1 Half-wave rectifier Diagram Available Photo Available 97
DK96 RVG1:1 MUL,EUR 7 B7G 1.4 0.025 Heptode (Battery, Directly heated) Diagram Available Photo Available 85
DETAILS: To see full details of any device, click on the device name.
SORTING: Most of the column headings for Device List results are actually hyperlinks which, when clicked, will sort the results by that column. This works much faster when dealing with smaller pools of results so try to narrow down on your initial search first. You may use successive searches as described for Radio Set Sorting earlier.

---
Off-Line Mode:
This database is written using JavaScript, and the whole thing runs inside your web browser, not some remote web server. This makes repeated searches faster since they do not require any additional downloading from the web to view the results, unless you want to see pictures of sets or devices which you haven't viewed during the session.  In addition, if you want to use this program OFFLINE (that is, when NOT connected to the Internet), you can add this page to your favorites and run it "offline" to save your phone bill. If you do this however, you should periodically update the content to stay current as new data and features are added often.

---
Performance Figures:
Since this database runs entirely in your web browser, its performance depends entirely on the machine you use to run it. Generally you shouldn't consider running this database in its present format on a PC with less than 64MB of RAM and a Pentium processor.    This table shows you the times in seconds you can expect for several typical PCs, although this doesn't take account of your Internet connection and download time - this can add several minutes to the figures you see the first time you access the system.
When listing large numbers of radios with a query (say 100 or more) you can also speed things up by electing to view less columns at once - viewing just Make, Model and References is 85% faster than listing all of the columns shown by default, however this is much less of an issue when you plan your searches to return a limited number of results for a query.
Type of Machine: Loading List All
Radios
List All
Devices
Pentium 200MHz MMX, 64MB RAM Windows 95 IE5.0 80 197 57
Pentium 166MHz MMX, 96MB RAM Windows NT4.0 IE5.5 59 161 42
Pentium 233MHz, 96MB RAM Windows ME IE5.5 54 123 37
Pentium II 300MHz, 128MB RAM Windows NT4.0 IE4.0 52 67  
Pentium III 500MHz, 128MB RAM Windows NT4 IE5.0 18 33 12
Pentium III 733MHz, 128MB RAM Windows ME IE5.5 17 28 10

---
Other Search Engines:
These search engines are on the web and although they concentrate on the valves (also known as "tubes") rather than exploring the relationship between device and radio set, these are very useful references to examine.   They also execute searches on the web server rather than in your browser so may give faster results on slower machines especially if your machine struggles to run this one of mine.
http://duncanamps.com/tubedata/ British site with masses of links for each device listed.
http://hereford.ampr.org/cgi-bin/tube   An American engine with a huge number of devices listed.

---
Future Plans:
Presently the entire database downloads to your own web browser and your computer then has the job of performing all subsequent queries.   The problem is that the "footprint" of the system, that is the amount of data which must be downloaded before you can start using it is now about 1Megabyte - and this situation will get worse as new sets are added.
To combat this problem, I intend to perform a major rewrite of this database system in the next couple of months to allow it to start performing queries very much faster than is presently possible.   Until then, please be patient - I'm doing all I can!

---
Contacting the Author:
If you have any comments, corrections or clarifications, please write to me at: martin@classaxe.com

Oh, and that "Mullard Inside" logo of mine?   Perhaps you don't believe your computer actually uses valves. Tap the screen and think about it...

Enjoy!
Martin Francis, August 2001 To allow offline caching of this image To allow offline caching of this image To allow offline caching of this imageTo allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image To allow offline caching of this image

---

How to List Radio Sets | Interpreting List Radio Set Results | How to List Devices Interpreting List Devices Results
Off-Line Mode | Performance Figures | Other Search Engines | Future Plans | Contacting the Author