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Does this mean none of this went through? Can some body help me with this software? Please.
Dave

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Dave Bohlen

There are very few watt meters (ham) that are accurate today. I calibrate everyone that comes through here. But think how great it makes you feel to double your output by replacing your meter! hi hi Chinese meters have an error of about 69%. A radio that is rated at 55 watts seems to put out about 38 watts, yep, quality.
Dave

This is a problem with the 301. I do have an instruction sheet on how to set the SSB osc's. You would think they would run 1.5 kc of center but there is a problem in the filter board I think. I set them to about 1.2 kc using two different tones back and forth. The manual is almost right on this one. There never was a service manual published as these were lemons that canceled instantly when the WARC bands came out.
Dave

In Europe they were sold as the Sommer Kamp 301. I probably have a good meter if you can't find one.
Dave

The front panel on the 301 is very easy to remove. Take a pick if you don't have a spare but no surprises in there. Just wrench time.
Dave

You don't have to remove the VFO to install the stabilizer. I've done lots of them. Directions are in the Elcon library. Easy job with basic ham skills.?
Dave

Very minor differences. The board had defiant #'s but all interchange.
Dave

Absolute must while your in there is to bond everything together with solder and a bridge to the vari cap chamber. If you still have that stupid plastic piece in there and it isn't floating around somewhere take it out and throw it away. They did that as a band aid to try to keep the VFO stable. Put a light sig in it and tap around, yep that's it. If it's a "D" model it is easy to make the VFO turn in the right direction. Covered int he Elcon library. Add an Elcon stabilizer to the back of the VFO for major stability. With the Elcon 33 I think it is I run them on 6, 2 and 220 mhz driving Xverters.?
Dave

Hi Fred. I've been trying to make this work for a while. I'm no wizard with computers. Calrad was making kits for filters. All my AM filters are in use. Every one I build gets a AM filter, even the one I use on 220. You can change the selector jumper to use an SSB filter but won't sound the best. You can also just change the jumper to the open slot and jump across where the AM filter would go. You can bring the band width down with a cap and a resister. Just takes time to make it bearable. hi Will be REAL wide band but works! Be sure to diddle your AM oscillator on freq as stock they ran 700 hz off for RTTY. If you have a Timewave 599zx sitting around you can bring your skirts in with it in the audio section. The AM filter was also used in the FT-620. That's the only two Yeasu's that I'm aware of that use the 9mhx IF. I have used one out of another radio with some success. Won't fit perfect but will work. Just look for 9mhx AM or 6kc band width filters.
Dave

Can anyone help? I have many of these and parts. Computers aren't my strong suit. Radio's are fairly easy.
Dave

Easy fix. Replace the grease and the ball bearings. Hardware store, bearing company or auto parts. Standard size. Please let me know if this is going through. I've been trying to get on here for some time but to no avail.
Thank you
Dave
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Dave Bohlen

Hi
I found this in my files.
Never did the mod though!
Fred
N1DEC

There was one listed on the auction site recently. Might check and see if it's still available.

73 -Fred, N8YX

A while back I ran across a PDF online detailing one ham's analysis of what it would take to convert a '301 to transceive on 10MHz. Looked in the Files section...nada.

Anyone else remember seeing this?

Thanks - 73
Fred, N8YX

Hi Fred.

You are correct that having an AM filter would improve the listening experience. I your case though, given how difficult it is to find a filter and the fact that the 301 isn't general coverage, there are limited opportunities for SWL. Unless you really, really love your 301, it might make more sense to get a portable SWL receiver for around $100. something like a Techsun PL660 or a reconditioned Sony 2001D/2010 (my personal favorites). You'll likely spend more than that on a filter to maybe just listen to 40 meter SW at night?

If you're competent with a soldering iron, performing a capacitor/resistor bypass on the AM slot in the filter board might work, but ONLY if you know what you are doing. I have not personally done this mod myself, so buyer beware..you assume all responsibility for your rig if you attempt this.

Hi Mark,

I also have two after-market filters that mostly have unintelligible writing on them. I <think> one of them is an Inrad/FoxTango (Blue lettering/sticker) 250Hz CW and the other might be a Wilson 6KHz AM with the correct center frequency. At least that's what the person I purchased it from told me. At some point I will sweep them on the spectrum analyzer and see how they look. But it's not a high priority for me right now. I don't run across filters for 301's very often. It's been my experience that CW filters are more available than AM filters. Comparatively speaking I don't think there were that many 301's sold and even fewer filters for them. No one really can really charge very much for them because the radios themselves aren't worth that much..

The rigs (that I am aware of) that used these same filter's (center frequency) were DZ-Kit's original Sienna rig - and they stopped offering the optional filters for sale about the same time that Inrad discontinued them (which was a looong time ago), the Yaesu FT-7b, R-530 (old Galaxy receiver??). So if anyone ever runs across any of these rigs, take a peek inside - you might find gold (in dem der hills).

Dayton/Xenia is next month - anyone going? One can usually find something they are looking for, but you might have to pay more than you want.

I believe that the original Yaesu approach was to jumper the unoccupied AM filter slot to the SSB filter. Resulting in a 2.7 KHz BW on AM Rx. Bypassing using either a cap or resistors will yield a wide-open BW of something like 20 KHz (the IF roofing filter's BW?). Which may be okay... depending on what you're trying to Rx.

Also note, I think in TX in AM mode, the SSB filter is used even if using a cap or resistors. You might want to check your transmit bandwidth in AM mode just to be safe. There's enough splatter on? the bands as it is....

That's an even simpler AM 'filter' than my three resistor proposal. Was it usable, or just too wwwiiidddeee?!

Regards,

Mark, G4FPH.

I also had the CW and SSB filters paralleled.? The AM filter was empty.? I fixed this and put a .01 uF capacitor across the empty AM filter position in mine.

Hi
My old 1977 FT-301D never had a AM filter. I was wondering where I could find one and how to go about
installing one. The filter board just has the stock CW and SSB filters. I can listen to AM shortwave stations on it but
I think with the filter it would be better sounding?
Fred
N1DEC