[Hallicrafters] Linear - HT-45 MK 11 A

[CALVIN L. SHERMERHORN]

Hi there: I have the above linear with 4-400 tube installed. Since the
manual is written concerning 3-400 can someone plse enlighten me as to
the "idling current control circuit" which appears in para 3-5. Does
this apply to the 3-400? The other reason for my question is that i am
looking for a 12VDC Dow Key Antenna relay with the Aux Contacts which
are hard to find. Are such aux contacts necessary with the 3-400.?
Tnx in advance for any help. Vy 73 de Cal VE4XQ.