Filters for Yaesu Radios

Yaesu FT-920

We receive frequent inquiries about how our products work with this radio. Here's an explanation which may help:

For SSB, you can install ONE filter, replacing the OEM filter. This requires a little board we call the SSB ADAPTER BOARD. We solder the filter to it, and send instructions for removing the OEM filter and installing our assembly. We charge $10 extra for a filter this way, because of the Adapter Board. Thus a single SSB filter ordered to replace the OEM filter is $125 (plus S/H).

Our choices for SSB are:

#716 2.8 kHz (maximum audio quality; minimum selectivity)

#709 2.1 kHz (we think this is the best all-purpose width unless conditions are very crowded)

#711 1.8 kHz (the contesters like this one: maximum selectivity, but minimum audio quality)

The OEM filter is 2.4 kHz.

For CW, you can install one filter in the option slot. It comes on a little pc board and plugs in, just like the Yaesu optional filter would. We don't have to use the special SSB Adapter board, so the price of a single CW filter is $115.

Our choices for CW are:

#701 400 Hz (our recommendation for all purpose, unless conditions are very crowded)
#708 250 Hz (for the contesters)

AM works like CW. Our filter is #710, 6000 Hz wide, $115 -- comes on a little pc board and plugs in, etc.

OR -- to make the radio the best it can be -- you can install our Switchboard Mod.

The mod is a small board (about 3" x 4") that holds two filters. They can be SSB or CW -- not mixed. But there is room for two boards if you wish to cascade filters for both modes.

For example: for SSB, the OEM filter comes out of the radio. Two filters get soldered onto the Switchboard mod -- it can be the OEM filter and one of ours, or two of ours. The mod gets mounted inside the case and the connections go to a small board that goes to where the original SSB filter was.

The same is true for CW -- two filters on the mod board, and a coax connection to a small board that plugs into the CW option slot.

There is an existing hole in the bottom of the radio's case, up front, right in the middle. A small toggle switch is mounted there. The operator can toggle the Switchboard mod in & out with his little finger as he tunes around the bands. If he is in SSB mode, the SSB filters will cascade; if he is in CW mode, the CW filters will cascade (assuming he has installed two Switchboard mods) (In other words, there is just the one switch, even for two mods).

The first (widest) filter on the board is the default filter. When the mod is toggled "on," then BOTH filters are cascaded. It is not a matter of "one or the other" it is "one, or both in cascade."

The SSB and CW filters noted above are the filters for the mod (or Yaesu filters). These filters do NOT come on little pc boards -- they come plain, and will be soldered onto the Switchboard mod. They are $115 each.

If a customer starts with one of our SSB filters, on the SSB Adapter Board, and later decides to install the Switchboard mod, he can take the filter off the Adapter Board and use it on the Switchboard, of course.

We are told all the time that it makes the rig very competitive. The Switchboard Mod sells for $80. It takes about two hours to install. The instructions are very detailed, and include photos and diagrams.

Reference	701-A	708-A	718-A	710-A	709.1	711.1	716.1
Filter Fits By:	PC Board - Drop In				replace OEM filter; solder in
Bandwidth at 6dB	400	250	1000	6000	2100	1800	2800
Mode	CW	CW	CW	AM	SSB	SSB	SSB
Center Freq. KHz	8215	8215	8215	8215	8215	8215	8215
Performance Curves Online?	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PRICE	$115	$115	$115	$115	$125	$125	$125

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