[Yaesu] FT101E AM Filter

[Dan Cotsirilos]

thanks Eric I thought it had to be something like that! Dan


----- Original Message ----- 
From: "Eric Dobrowansky" <kk2ed at comcast.net>
To: "Dan Cotsirilos" <dcsfree at worldnet.att.net>
Cc: <yaesu at mailman.qth.net>
Sent: Saturday, March 12, 2005 9:14 AM
Subject: Re: [Yaesu] FT101E AM Filter


> There is a modification, which is documented in the FT101 service manual, 
> which re-wires the mode switch to select the optional filter "position" in 
> AM mode instead of CW mode. Basically, one of the wafers on the mode 
> switch selects the SSB filter for SSB, TUNE, and AM modes, while the 
> optional filter slot is selected in CW mode. When the optional filter is 
> not present, as when new, the filter board has two caps that couple the 
> stock SSB filter to the optional filter slot, essentially making the one 
> filter work in both slots.  For the CW narrow filter installation, you 
> simply remove the two caps and solder in the filter. To use an AM filter, 
> you need to remove the caps, solder in the filter, then re-wire the mode 
> switch to select the 2nd filter slot on AM mode rather than CW mode.
>
> The FT101 series was never really designed for an AM filter. However, 
> after the radio grew in popularity, especially with the 11-meter crowd in 
> the late 70s, the mod became well known and simple enough to perform. The 
> actual XF-30B 6.0KHz filter was originally offered for the FR-101 receiver 
> of the FR/FL 101 twins.
>
>
> Eric
> KE2D
>
> ----- Original Message ----- 
> From: "Dan Cotsirilos" <dcsfree at worldnet.att.net>
> To: <w2nra at optonline.net>; "cwoodside" <n1muq at optonline.net>
> Cc: <yaesu at mailman.qth.net>
> Sent: Saturday, March 12, 2005 9:31 AM
> Subject: Re: [Yaesu] FT101E AM Filter
>
>
>> The 101E manual does not show how to install a AM filter only a CW one. I 
>> put a 101E filter board in a 101E that had a AM filter on it that worked 
>> perfect in the 101E it came out of.
>>
>> When I inter-changed boards they were not compatible each other. the AM 
>> 101E was mute in the "AM" mode and the other one still received narrow 
>> "AM" even with the AM filter on the board. I.E. it was still using the 
>> SSB filter to receive. it seems some change must be made to the radio 
>> itself for the AM filter to work on a 101E? Does Inrad provide this info? 
>> Dan
>>
>>
>>
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Art Searle W2NRA" <w2nra at optonline.net>
>> To: "cwoodside" <n1muq at optonline.net>
>> Cc: <yaesu at mailman.qth.net>
>> Sent: Saturday, March 12, 2005 6:55 AM
>> Subject: Re: [Yaesu] FT101E AM Filter
>>
>>
>>>
>>> InRad makes it at:
>>>
>>> http://www.qth.com/inrad/
>>>
>>> 73,
>>> Art
>>> W2NRA
>>>
>>> cwoodside wrote:
>>>> These seem to be very hard to find. But I am still looking so I thought 
>>>> I would ask again. Looking for the AM filter for a Yaesu FT 101E { 
>>>> *XF-30B } Thanks Charlie N1MUQ
>>>> *
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>>>>
>>>>
>>>
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