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Old 30th March 2005, 10:58 PM   #1
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Default searching for darling tubes.

Im building a darling amp and need advice here.

Has anyone made sonic comparison between the 5965 and the original 8532 driver tubes?

It seems that in 8532 design, the driver is loaded with a higher plate resistance while 5965 is lower. I am no EE, but I know this effects the voltage/current ratio that DIY-ers play around with. So im sure there are sonic difference between the two circuit (other than the tube sound difference).

Im locating those 8532 tubes (d4rn hard to get in third world country..) so if anyone has spares dont hestitate to contact me, thx.
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Old 30th March 2005, 11:14 PM   #2
qwad is offline qwad  Australia
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cheers, get in touch with bob danielek the designer of the darling and see what he has to say, l know l'm not much help right now but this is the logical thing to do, pick his brains if you can.... all the best TC
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Old 30th March 2005, 11:37 PM   #3
arnoldc is offline arnoldc  Philippines
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I bought my "darling" parts, including the 8532, from Angela.com

Be prepared to deal with Steve and FedEx
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Old 31st March 2005, 07:11 AM   #4
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How do you guys enjoy your darling?
cant wait to get home after 4 to get some soldering done.
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Old 31st March 2005, 07:26 AM   #5
arnoldc is offline arnoldc  Philippines
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believe it or not, i have not made the amp yet. the parts been sitting in the box for years, while other amps come to life...

maybe later, i will
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Old 31st March 2005, 08:17 PM   #6
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Sounds a bit sacreligious, but I'm planning a PPP version - three pairs of 1626 in push pull with a 6.6K OPT. Should be good for 10 watts. Not sure what to drive that with - I could start with a 6SL7 in diff pair with a CCS - that drives my 12b4 amp. Maybe something more exotic.....
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Old 3rd April 2005, 10:51 AM   #7
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Initialy I was planning to drive it with 12b4 (my fav tube) but the gain is too low for the job. I talked to bob, and I agreed that 8532 is still the best tube for the job.

My darling is singing for the first time yesterday, and oh my.... marvellous!! It has the sweet tube sound without any loss of speed, just what I needed! It does all that techno with ease that is comparable to SS gears.

Applying basic grounding rules, it is hum-free now. The changes I made to bob's design is I tied the filaments to ground instead of cathod. (If you are using exotic caps on the cathode, why ruining it by tying filament ac to it?)

In fact, Im so confident of my construction that I didnt bother to check before I connect to my speakers!

Picture to follow after next week!
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Old 4th April 2005, 12:35 AM   #8
arnoldc is offline arnoldc  Philippines
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is yours the standard darling or monica?
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Old 4th April 2005, 01:40 AM   #9
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Its a standard darling. However, I may try the DC version someday. I am not aware of the monica version.

A word of caution for future builders: 0.75watts cannot produce enough bass. However, the reproduction of upper octaves are so good that you wouldnt really notice.
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Old 10th April 2005, 08:23 AM   #10
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photos as promised
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