OP, Others,
Sorry I confused these two brands, I was trying to share my enthusiasm, and still do, for both
Kara deHavilland talked for a long time with my friend, he agreed to wait until she could get the specific transformer she wanted to use, she agreed and built the tube preamp for my friend in 2023.
http://www.dehavillandhifi.com/UltraVerve-Preamplifier.htm
and I confused his vintage Hagerman Cornet2
(no 2nd ’O’, a tube phono kit built by former owner) as a deHavilland, somehow I thought he got both pieces from Kara.
factory assembled Hagerman Cornet Tube Phono, MM
Both tube, both sound wonderful in my and his system. He has Hagerman Tube Phono to deHavilland Tube Preamp to big McIntosh SS amp with monster meters to JSE Infinite Slope Model II’s that he restored. Here we listened via my Tube Cayin amp, comparing favorably to my McIntosh MX110z Tube Tuner Preamp’s MM Phono, using my Fidelity Research FRT-4 SUT to hear my MC
OP is mentioning Hagerman's TRUMPET Tube MM/MC Phono, the Trumpet adds MC capability, otherwise the innards/RIAA is identical to the Cornet MM Phono.
Hagerman Trumpet Tube Phono MM and MC
so sorry to derail this to confusion