Type: Driver
File Name: eico_730_19120.zip
File Size: 39.6 MB
19 (4.59)
Downloads: 14
Supported systems: Windows 10, 8.1, 8, 7, 2008, Vista, 2003, XP, Other
Price: Free* (*Free Registration Required)

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At this point it would appear the 30 watt rating for the modulation transformer is the limiting factor--that means the transmitter power amp is running 60 watts eico 730 modulator less input. At percent modulation, the instantaneous plate voltage is doubled, for a 4X PEP output.

That modulator could be used with a variety of early novice CW transmitters, which can be set for 60 watts plate input, or even with a matching homebrew design. If that is a universal transformer, it will have multiple taps on the secondary, which makes it even more versatile. This eico 730 modulator is subject to change until you make payment.

For additional information, see the Global Shipping Program terms eico 730 modulator conditions - opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees. For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab.

Eico 730 modulator/ driver

Estimated between Wed. Estimated delivery dates - opens in a new window or tab include seller's handling time, origin ZIP Code, destination ZIP Code and time of acceptance and will depend on shipping service eico 730 modulator and receipt of cleared payment - opens in a new window or tab.


You may contact me at dbiverson at gmail. I removed the mod as I wanted the transmitter to be as original eico 730 modulator possible and also was not sure of the consequences of leaving it in. Note that pin 1 of the octal plug going to the connects to pin 6 of the octal plug going to theand that pin 4 of the plug connects to pin 4 of the plug. The operation of the remote control relay in conjunction with the modulator remote switching leads from pin 8 of the octal plug and ground is as follows: Pin 8of the out- put octal socket in the modulator is internally connected to the center-tap of the high voltage secondary winding of the power transformer. The plate power supply of the modulator does not operate unless this center-tap is grounded.

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  • Eico 730 Modulator-Driver

When the relay is energized at the transmit function of the transmitterthe relay contacts used for remote switching are closed and thereby the center-tap is grounded, causing the eico 730 modulator plate supply to oper- ate. The negative feedback loop makes the audio response very flat and clean.

Or, for now, you may continue to use this site without unblocking ads. The Eico modulator eico 730 modulator a nice unit that can set up on top of the with no problems at all.

This eico 730 modulator a great transmitter on both CW and AM with the modulator. My 50 watt AM signal gets good reviews on 75 meters. The Ranger was similar in cost, and you had to buy the whole thing at once. Return shipment will be made by express collect.

Eico modulator manual/schematic?

No Input signal. Appropriate load resistor connected to output. PIN NO.

I decided to get the transmitter operational first eico 730 modulator CW and then work on the modulator. If you plan to use a D mic with thechange R2 to 4.

Now to find an old BA receiver Started out on 7. I never had a lick of trouble with that transmitter.

Modulator-Driver 730

Important Rules Have you read the Swapmeet Rules? The VFO has another tube for good isolation and more drive. Eico 730 modulator file I'll scan the schematic later today and post here in the GIF format.The Eico 50 watt modulator/ driver was introduced in According to the Eico ad in the Radio Amateur's Handbook, it was sold as a kit for $ Eico manufactured a lot of test gear, audio gear, and some ham gear. They even had a surprisingly affordable tri band model sideband rig covering the most.

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