How to Order a W3NQN CW Filter Kit

Mail a letter via US postal service to:

Edward Wetherhold
1426 Catlyn Place
Annapolis, MD 21401

1- Include a check, or money order to Ed Wetherhold for $70. The cost is $90 for orders outside the US, includes shipping.
2- Specify choice of center frequency, 546 Hz, 600 Hz, or 700 Hz.
3- Include your shipping address.
4- A note to Ed, telling him how you learned of his CW filter.
5- In your order, please include your e-mail address so you may be advised of the expected date of delivery.

Your filter will be shipped by Priority US Mail.

CENTER FREQUENCY
You must specify your desired center frequency of 546, 600, or 700 Hz, which is determined by the CW side-tone of your receiver. Or if you have a variable CW side tone frequency, then specify your desired side tone frequency of 546, 600 or 700 Hz. 800 Hz is also available but is not recommended because it has too high a pitch for comfortable listening.

Partial Kit Available

For those wanting to install only the critical parts of this passive LC CW filter into a receiver already assembled, such as the HBR-XX 20-tube home brew receiver, you can obtain the inductor stack with a plastic mounting clip, two separate inductors, two 8/200-ohm transformers, a matched capacitor set for 546, 600 or 700-Hz center frequency and a short assembly procedure for $40 postpaid, (Cost is $60 outside of the USA).

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