Reading the BH EL84 thread and also skimmed a bit of Bandersnatch threads. I also looked at the Tubelab SPP EL84 product and some of the information looked like it might work for me. Needs someone with better understanding to give a verdict.
Tubelab SPP advantages - simple, no semiconductors (ultimate simplicity), lots of builds, good support, relatively easy to build without a PCB
BH advantages - probably marginally better performance if OPTs are less than ideal, lots of builds, good support in build threads.
minor disadvantage - Off-PCB builds more complex with the additional sub-circuits involved - perhaps best done as a mix of PCB for the CCS circuits and the rest P2P, needs a negative rail for the ccs (minor issue)
Toss a coin and make a choice. Both have good reputations
BH advantages - probably marginally better performance if OPTs are less than ideal, lots of builds, good support in build threads.
minor disadvantage - Off-PCB builds more complex with the additional sub-circuits involved - perhaps best done as a mix of PCB for the CCS circuits and the rest P2P, needs a negative rail for the ccs (minor issue)
Toss a coin and make a choice. Both have good reputations
I contacted Doug (Bandersnatch). Let's wait and see what he comes up with.
FWIW, it seems clear to me is that several very reasonable options are coming to the fore.
FWIW, it seems clear to me is that several very reasonable options are coming to the fore.
I have read the first 60 pages of the EL84 thread and found 2 references that some people have built with the 6.6kohm rather than the 8kohm. Ian also mentioned that the 1620 6.6kohm can be used, hence I do believe the 1626 6.6kohm can be used also. I will keep browsing the thread. Any word from Doug B.
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