lorenz df96 - tung-sol ken rad dl92 / 3s4 mil spec
picture of the dream team please
replacements for dl92 tubes:
i did some research to find alternatives for the dl92 tubes.
the first is the 3S4T
(some time ago ianmedium posted also this tube type but no recommendation), but i think it's worth a look because it needs only half or quarter of the power for the heater. bad luck this tube is rare as gold nuggets with diamonds inside.
the second is the 1L33 / EP201 (i am relatively to really sure)
it needs only half the power for the heater compared to the dl92 and is available, at least 6 pieces left after i bought four of them already here:
power consumption (heater, current):
df91: 50 mA
df904: 50 mA
df96: 25 mA
dl92: 100 mA
1l33 : 50 mA
3s4t : 50 mA / 25 mA (with the tu-05 50 mA)
it is obvious but also a nice option that using df96 / 1L33 tubes will result in half the power consumption for the heaters, so possibly nearly double the run time of the amp.
will post some results after having received the 1l33 tubes.
yes, what was really amazing for me was that the lorenz df91 - philips dl92 combo in comparison to the lorenz df96 - tungsol ken rad dl92 combo sounds .... sorry, but the words boring and lifeless came in my mind in comparison!
i know this your post, but i think he is wrong. the 3s4t has two options to connect both parts of the heater (50 mA) or only one half (25 mA, low power mode, reduced output power)! so maybe less power, but not so much less to be unusable!!
it is a factory for military equipment ianmedium mentioned some time ago.
yes, and there is another point: if i would write about each not so good pairing i tried there were more bad than excellent combinations to read about here, but naturally we post if we find something worth to be posted, so not the rules of statistics violated, just posting what may be of interest or an improvement!
i hope it is ok that from time to time i post an updated list of my posts to better find older articles and topics:
tube cleaning kit:
interconnect jacks and cables:
my diy interconnects:
gold plating tool:
tube pins gold plating:
my reference tracks /cd's to listen to the tu-05:
standard tube rating form:
tu-05 first impressions:
tu-05 with lorenz - philips combo:
my tu-05 setup with player and headphone:
tu-05 power supply:
valvo and lorenz tube combos:
siemens tubes and short summary:
valvo red label:
listening to different interconnects:
tube rolling: ultron tubes:
tube pictures by manufacturer:
protective carrying pocket for tu-05:
tube rolling: valvo red label - tung-sol ken rad combo:
summary and valvo red label - lorenz combo:
basic explanation of amp function and construction:
tube rolling: telefunken df904:
tu-05 - noise and rf interferences:
tube pictures - lorenz df96:
tube compatibility - df96:
tube rolling: lorenz df96 - philips dl92 combo first listening impressions:
tube cleaning kit distribution:
tube rolling: lorenz df96 - tung-sol ken rad dl92 combo:
tubes: replacement types for dl92 (and df91):