REFERENCE SECTION FOR TUBE ROLLING FOR BOTH TU-05 AND TU-06 AMPS PLUS... GERMAN GUYS HEADPHONE AND POWER JACK MODIFICATION! UPDATE: FACTORY CODE REFERENCE MATERIAL!
BRIMAR AND MULLARD CODE INFO
Military valves have different markings to commercial valves. Most have a CV number (CV = common valve) It is best explained with an example. I recently sold some E88CC or 6922 with the following markings CV2492 KB/AD ZF. Decoded this means:
CV2492 is saying this is an E88CC or 6922 or any other equivalvent - ie a high class 6DJ8 or ECC88.
K is saying this valve has been made to specification K1001 or K1006 if it had been a J it would have meant it was made to a JAN or MIL spec.
B is saying the qualification approval was given by a UK authority, if it had been a U it would be US or a D for Australia or an X for DERAD Air approval.
AD is the factory identification code in this case Brimar rochester plant. There are several pages of codes and some of those you might look out for as well respected makers of valves are D Mullards Mitcham, DA Mullard Blackburn, DB Mullard Salford, DC Mullard Whytleafe, DE Mullard Fleetwood, DF Mullard Waddon, DH Phillips France, L MOV pre 1951, Q English electric, QB Marconi, QC marconi, R Ferranti, Z MO Hammersmith, ZA MOV Gateshead, ZB MOV Perivale, ZC MOV springvale, ZD MOV Dover.
ZF is the date code which was 1968 June. . The first letter representing the year starting at A for 1945 and second the month so AA would be 1945 January, AB is 1945 February and NF 1956 June and so on with I and O not being used.
There is another system of date marking used from about 1965 onwards and that consisted of four digits, the first two being the year and the last two being the week so 6407 would be February 1964. The date code was the date the code was put on the valve so if there may be an earlier manufacturers code on the valve as well.
If you have found this useful please vote YES below as this will enable more people to see it and encourage me to write more guides on valves. If there is something incorrect please email me and tell me so i can put it right.
PHILIPS CODE INFO
http://www.pauls-roehren.de/downloads/PhilipsCodeListAB.pdf
Ian's Tube Cleaning Method
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/165#post_9305627
German Guys Tube Compatibility table
TU-05 TUBE COMPATIBILITY LIST:
TU-05 TUBE COMPATIBILITY LIST:
DF91 STAGE:
tubesame typeheater voltagemAcompatible (if)powersave moderemark
DF911T4, W17, 1K2, 1F31.4V 50mAyesnotested
1T4T, 1T4SF1.4V 25mAyesno
DF9041U41.4V 50mAyesnotested
DF961AJ4, 1F33, EP2021.4V 25mAyesnotested
DF971AN51.4V 25mApin 4 and 5 connectednotested
1F34 1.2V ?heater voltage resistornonot tested yet
DL92 STAGE:
tubesame typeheater voltagemAcompatible (if)powersave moderemark
DL923S4, VT-174, CV8201.4V 2x50mAyesyestested
3S4T1.4V 2x25mAyesyes
DL911S41.4V 100mApin one disconnectednotested
1L33 1.4V 50mApin one disconnectednotested
GERMAN GUY'S TUBE ROLLING EXPERIMENTS (TU-05)
standard tube rating form:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/795#post_9593228
tu-05 with lorenz - philips combo:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/870#post_9610188
valvo and lorenz tube combos:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/885#post_9610868
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612010
telefunken:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612467
siemens tubes and short summary:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612624
valvo red label:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/915#post_9613134
listening to different interconnects:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/930#post_9614421
tube rolling: ultron tubes:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/945#post_9614695
tube rolling: valvo red label - tung-sol ken rad combo:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1020
summary and valvo red label - lorenz combo:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1050#post_9624911
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1080#post_9629496
tube rolling: telefunken df904:
www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1140#post_9632746
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1185#post_9639203
tube rolling: lorenz df96 - philips dl92 combo first listening impressions:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1215#post_9643209
tube rolling: lorenz df96 - tung-sol ken rad dl92 combo:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1245#post_9650382
tube rolling: philips df96 - tung-sol ken rad dl92 combo:
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1425#post_9669643
GERMAN GUYS MODIFICATION
TU-05 TWIN OUTPUT MODIFICATION
Here is my documention on how to modify the tu-05 with a rear 6.3 mm headphone out.
some initial thoughts before you start doing the same modification:
you how to say should know what you can do with electronic parts and what better not:
- bending
- heat resistance when soldering near by
- ...
some basic knowledge is recommended:
- electronic parts and electronics
- how to use a multimeter
- how to desolder and solder
- ...
before starting one should think that something can goes wrong, no success, there is a damage, failure etc:
- ability to debug analog electronics may be needed
for the work and metal work - especially the large hole for the neutrik jack:
- all the tools in place?
- a fine resonant free drilling machine
- a small to tiny electronics soldering iron (not the 100 watt tin can soldering version)
things i used (a maybe not complete list):
- cables, shrink-on tube, tape, pressured air, solder, clips, tool for cable-demanteling, different claws, fine and medium rasps with different shapes, shaping tools, drills for metal, screwdrivers with the exact size, heat gun, digital multimeter, sandpaper, a small brush, vaccum cleaner, 2 litres of coffee, 5 hours, screw clamps to fix the drilling machine on the table, small woodplate, two plates and two wood pieces under the amp while drilling, 6.3mm neutrik jack, 2nd as reserve, superglue or screws for the neutrik jack, knife, toothpicker, pieces of cardboard, ...
if you have decided to do this modification:
- always use a brush, pressured air and a vacuum cleaner to after each step remove all (and be absolutely sure that there are NO) aluminium parts, particles and dust left.
- check everything, charging, channels left right correct, two headphones at the same time, charging while listening, ...
so much fun doing the same modification .....
Opening the amp..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Removing the battery..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Removing the power jack..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Preparing the amp for the next steps..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Installing the power jack in its new front position..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Preparing the hole for the Neutrik 6.3mm jack..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Partly assembling the amp for the next steps..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Reassembling the battery and power jack..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Assembling the additional cables for the rear headphone out and Neutrik 6.3mm jack..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Amp completely assembled, open..
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#
Amp completely assembled closed case and case closed!
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1710#