VERY RARE VINTAGE 1941 MILLEN 90700 VARI-ARM ELECTRON COUPLED OSCILLATOR (VFO) For Sale

VERY RARE VINTAGE 1941 MILLEN 90700 VARI-ARM ELECTRON COUPLED OSCILLATOR (VFO)

VERY RARE VINTAGE 1941 MILLEN 90700 VARI-ARM ELECTRON COUPLED OSCILLATOR (VFO) - THIS MODEL COVERS THE 80 AND 40 METER BANDS

Photos are the actual MILLEN 90700 VARI-ARM VFO Serial No. 361

The Millen Variarm Electron-Coupled Oscillator made its appearance in the mid-40's. It is the commercial version of a unit presented in the January 1941 QST (cover article) designed by Henry Rice W9YZH. The 90700 was designed to operate on the amateur 160, 80 and 40 meter bands. Two wiring flavors were offered, that could be changed by the user, with the 90700 wired for 80 and 40 meters and the 90701 for 160 and 40 meters.

The Variarm was a stable transformerless oscillator capable of roughly 2 watts RF output. It uses a 6K7 oscillator and a 25L6 buffer. No power line transformer is used, so the above tubes along with a 25Z5 rectifier have their filaments wired in series across the AC input power line. The name Variarm comes from the fine frequency tuning arm that is attached to the side of the 6K7 oscillator box.

The resistor line cord has not been replaced. Requires tubes. Untested

Buyer to add $18. shipping (USA).

QUESTIONS? please ask them before offerding.

PAYMENT INFORMATION:You can either use the "PAY NOW" button at the end of the sale, orI'll send you an invoice.I try to ship most items within2 business daysof payment. NOW REQUIRES A SIGNATURE UPON DELIVERY FOR ALL SHIPMENTS OVER $750..

INTERNATIONAL buyers:I accept payments from International buyers for amounts up to $250. For larger amounts,contact me.

SELLING INFORMATION:I try to inspect most of the equipment I list for sale, and to describe each completely & carefully. However, since some of the items can be over 60 years old, all items are sold "as is". Almost every older electronic item will benefit from a careful alignment and cleaning or other restoration. Images may not be unique. Shipping charge may not include AK or HI