Restored! Eico 730 50 watt modulator/ driver TUBE AMP 5AR4 12AX7 6CA7 EL34 @Nice
1958 Eico 730 50 watt modulator/ driver TUBE AMP. - Eico 730 modulator/ driver with Cover and Manuals (Owner / Construction).The Eico 730 50 watt modulator/ driver was introduced in 1958. Eico 730 without cover The modulator is designed for plate modulation of the matching Eico 720 transmitter or any transmitter with RF input power up to 100 watts or for driving a high power class B modulator. Like the 720 transmitter, the 730 featured a heavy copper-plated chassis and a nice low-profile design. The eye tube is used to monitor modulation levels.
The octal socket on the rear panel includes the modulation transformer secondaries for matching various impedances from 500 to 10,000 ohm. Tubes include a 12AX7 preamp, 6AN8 amplifier-phase inverter, 6AL5 speech clipper, a pair of 6CA7/ EL34 in push-pull, an EM84 eye tube, and a GZ34 / 5AR4 rectifier. The circuit is class AB1 with fixed bias.
Eico 720 transmitter and Eico 730 modulator with covers. The plate B+ of the 730 can be controlled remotely at the 720 or other transmitter as well as by a front-panel switch. Connection is by cable and plugs for the rear panel octal sockets.
Eico 730 50 watt modulator/ driver TUBE AMP 5AR4 12AX7 6CA7 EL34 @Nice" is in sale since Sunday, March 21, 2021. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers".
The seller is "tubescoins" and is located in Huntley, Illinois. This item can be shipped worldwide.
- Model: 730
- Type: Amplifier
- Number of Outputs: 1
- Color: Gray
- MPN: 730
- Number of Inputs: 1
- Power: 4000 W
- Brand: EICO