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Edward Huggins · 22nd Apr 2021, 2:03 pm

The OP's photo under #1shows the correct control unit for this. The Stereo-8, a much more complex pre-amp shown in #2, was normally supplied wth the DPA10s. You will find that this version may be very close to the Mullard 3-3 design, as was the DPA10 to the 5-10. We had a Trade Account with DULCI. I can't quite remember how the EF86 was coupled to the EL84 though? Dulci used quite good components. Although the OPTX may loook a tad small, they are adequate for the job and better than many.

22nd Apr 2021, 2:03 pm	#6
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dulci stereo power amplifier The OP's photo under #1shows the correct control unit for this. The Stereo-8, a much more complex pre-amp shown in #2, was normally supplied wth the DPA10s. You will find that this version may be very close to the Mullard 3-3 design, as was the DPA10 to the 5-10. We had a Trade Account with DULCI. I can't quite remember how the EF86 was coupled to the EL84 though? Dulci used quite good components. Although the OPTX may loook a tad small, they are adequate for the job and better than many. __________________ Edward.