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RE: single Lundahl LL1670 grid choke for Push-Pull?

I use a LL-1670 in a DHT PP amp in much the same manner, and also compared it to the Silk GC-1(its inductance is more than 7,000 Henry at 12Hz while having very low DCR of just 1.3K ohm.)

Although the specs suggest potentially more ideal characteristics for its typical application, I preferred the resulting sonics of the LL-1670... you will certainly need to experiment with the coupling cap and as Tre mentioned, adding a series resistor defeats the point of the exercise.

In my circuit I was able to further tune the low end response by virtue of interaction with the cathode bypass caps, which I ended configuring to ultra path.
After numerous listening tests I was able to achieve truly outstanding low end performance to my preferences, via tuning of the collective interactions.


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  • RE: single Lundahl LL1670 grid choke for Push-Pull? - coolhand 17:21:49 11/30/15 (0)

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