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Broskie 12VAC aikido board with 6n1p tubes
Broskie 12VAC aikido board with 6n1p tubes
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Old 12th September 2019, 03:18 AM   #1
Sadface is offline Sadface  New Zealand
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Join Date: Jan 2012
Default Broskie 12VAC aikido board with 6n1p tubes

Hi Guys,

I've been looking at building a 12vac aikido board and I am wondering if anybody has tried running 6n1p tubes with a 12vac board?

I ask because 6n1p tubes are cheap and plentiful in my neighborhood whereas 6dj8s are not.

I frequently see 6n1p tubes sold as a 6dj8 replacement but I also understand this is not strictly true.

I will freely admit that I don't yet understand enough about triode curves to answer this question myself off the spec sheet.
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Old 12th September 2019, 07:34 AM   #2
tikiroo is offline tikiroo  New Zealand
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Join Date: Nov 2007
Location: New Plymouth
Hi Sadface, I've got no experience using 6n1p but looking at the curves it seems that they aren't particularly suitable for use at low voltage (12v ac Aikido has each tube at about 40V I think). Current will be low and distortion high. Perhaps you should go for 6n6p instead which looks much better at low voltage. Although TradeMe has 6n1p @ $10 a pair vs $25 a pair for 6n6p.
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Old 12th September 2019, 01:06 PM   #3
Steve Morley is offline Steve Morley  Canada
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Join Date: Jan 2015
Location: Georgian Bay
Both the 6n1p and the 6n6p draw a lot more filament current than a 6DJ8. The power supply on12Vac board is a "multiple" voltage multiplier with taps for filament at one level and B+ at a higher level. The PS might not respond well to the extra filament loading. There might be more ripple on the B+? You might need a larger power trans as well

Aside form the lower B+ (~80 volts) not working with the 6n1p and 6n6p you won't have many tube rolling options with these.

If you haven't bought the Broskie kit yet he'll sell you, as an option, four JJ E88CCs for $56.

A cool NOS tube that is reasonably priced (for NOS) is the Tesla ECC88. They kind of remind me of the Mullard Blackburn ECC88 with a more rock 'em, sock 'em sound than the JJs.

Steve
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