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It workewd for me, yesterday. I pluged mine in and the frequencies were operational. Just got to retune the radio for 52.000 Mcs.-52.99 Mcs. RX & 53.000 Mcs.-53.990 Mcs. TX for a repeater. ------- I

script kiddy , dont click just delet ________________________________ Sent: Wednesday, 19 September 2018 11:48 PM To: Repeater-Builder@... Subject: Re: [Repeater-Builder] Final

I have modified a couple of "LM" (Linear Modulation) brand ACSB Repeater PAs for FM Use. It is quite easy. There is a switching transistor that gets removed and replaced with a jumper - that's it.

If you discuss the bare notch filter or cavity response without any other tricks or compensation, by nature of electronics theory, it will probably be non-symmetrical in most cases where the

Many notch filters are not symmetrical.? If you look at some of them, one side? will have just a T connector between the cavities and the other side will have what looks about like a 1/4 wave of

Ed,if the software doesn't accept the freq,an IC can't help. The IC on ebay is for alignment in the hm bands.

The Yahoo group/email messages out of sequence is really messing with me here... #motarolla_docter Yep, that is how I tuned it. But I tried both ways just to see. But yes, the Low is indeed Low pass

For reference, here is the frequency response plot for both sides. At a 10Mhz split, the insertion loss is great, around 1.2dB. But look at this with 5Mhz split, pretty bad. This was used for a

I came across a feller who has chip replacement to allow such programing in the ham bands. So the MaraTrac would not need hexedited. However, one still needs to retune the MaraTrac manually. RB's

Jeff, Sorry I wasn't clear in that last email. I did try it. The insertion loss was worse. -J

Spam??? Mark - N9WYS? Sent from the Yahoo Mail app on my Galaxy Note 8. Please excuse all typos - fat fingers on a little keyboard.... On Wed, Sep 19, 2018 at 4:04, Steven M Hodell

Thanks. I thought with the color of the case and the sticker it looked like a decibel . I was also hoping it was in the 440 MHz range. Thanks again. JohnN4GRW Decibel DB4068 or DB4072 depending on

Dear, Your Steven M Hodell invoice is ready to view and is attached.Invoice Number: 2XW7079Due Date: 24 September 2018.Amount: 546.90. Sincerely, ------ Steven M

Can't you use Maxtrac Lab software and just program in the out-of-band feqs that way?.. Maratrac radios utilize a Maxtrac main board... - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

I need a low band codeplug so I can verify that I did indead hex edit my software to allow entry of 50-54 mhz freqs. Can anyone help? My email addy is" n5tbu at wildblue dot net Thanks, Mark

That's not a definitive test. The notches will always "work" regardless, it's the resulting response at the pass frequency that would be adversely affected if the duplexer were tuned backwards. Have

I think you're right on this Bryan. I can't get a 5Mhz split to tune on this thing, no matter what I try. But if I get close to a 10Mhz split, it looks okay.

I'd try that next. Those Chinese duplexers are hit or miss, they could have very easily run out of 5mhz units and given you a 10 mhz split one. At 7.5 db you could use two circulators a duplexer

Flatpack Duplexer Fun I do a flatpack duplexer pre-alignment... With an example 452 & 457 MHz pair, (5 MHz offset) targeted. I might move all the low notches all the way down, well below 450 and

Jeff you are 100% correct. They are not symmetrical, I don't know what I was thinking since the frequency response swings up or down based on the side of the duplexer. Here is a snapshot of the