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NXP

kopcicle

Sr. Member
Feb 17, 2016
2,087
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https://www.digikey.com/short/phhnnv

This list comes with an anecdote. Edgar the loud (cat) key-walked an order for 250,000 or so , wiped out the list twice while I was AFK , and placed gibberish in the comment box. Digi fortunately called the next day asking "wtf?" ...
If you've ever made up one of these lists from a BOM you know the time invested. In any case you're welcome. I'm regularly calling Edgar "Stir fry" . He seems to get my frustration and avoids me and the keyboard.

https://www.coilcraft.com/pa/order.cfm?ID=17541078
https://www.coilcraft.com/reqsamp.cfm
 
Umm, I hope you kept a record of that.

I seem to have "done an Edgar" with that list.

It showed "not a valid stock number" in one column for every part on the list when I looked at it.

Seemed odd.

Clicked a button that says "clear all errors".

Should have been labeled "cause all errors".

List came back with only one item after that.

Looked for an "undo" button.

No such luck.

Scheisse!

73
 
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items in Order: 13

Subtotal: $26.96

Shipping: $8.99

Tariff: $0.89

Sales Tax $3.72

Total: $40.56

this was for two MRF101-START
 
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Past time for an update...
first off is the nagging little detail of getting from the amp to the antenna.
I'll start here .
2019-09-12T14 05 48.547Z-2.jpg

Automatic Antenna Tuner 7x7 ATU-100 mini by N7DDC
https://www.tindie.com/products/ra0sms/automatic-antenna-tuner-7x7-atu-100-mini-by-n7ddc/
Just one of the many places to obtain one. Just a very useful tool to couple 100w to an antenna.
Remember these links?
https://www.w8ji.com/windom_off_center_fed.htm
https://sites.google.com/view/kn9b/guanella-current-balun

Okay , moving right along. A "tuner" is not a low pass filter. It can be to a certain extent if a Pi-L design but that is for the advanced course or for those that want to look up the Drake MN2700B schematic and or manual (available on request)

So for any broad band (absolutely) and (most) single ended (even monoband) sand state devices a low pass filter is necessary. The harmonics pouring off these devices is significant. So now we're on to switchable low pass filter networks.
First 100w
100wLPF.jpg

https://www.ebay.com/itm/12v-100W-3...644407&hash=item3b33c818ed:g:MMUAAOSwJSJXGEeT
If it's out of stock many sell the same thing.

Then on to 600w

F600-main1.jpg
F600-v1.0-schematic.png

Appropriate thanks to Razvan M0HZH
WD24 6DQ Watford
England, Hertfordshire
https://qrpblog.com/2019/12/f600-600w-low-pass-filter-board-for-hf-vhf/

I'll cite Razvan's work as an alternative to re purposing a 100w LPF from an HF radio
751.jpg
IC-751 in this case.
Razvan's work also fills that all important niche between 100w and 1.5K .
Speaking of 1.5K
1.2kwLPF.jpg

https://www.ebay.com/itm/Low-pass-f...747044?hash=item3b0d368424:g:UdAAAOSwfLJa-uZh
Or
1.5KwLPF.jpg

https://www.ebay.com/itm/LPF-low-pa...999617?hash=item1eccdc2a01:g:3OUAAOSw4DJYib3R

Now on to the amplifiers

A600-2.0-heatsink-1024x650.jpg

Again, Razvan's work and can be found on the same site as the LPF
Why else would you need a 600w LPF ? A 600w amp is a good enough reason.
Note that the output combiner/transformer does not carry any DC current. Current to the Drains is supplied by a common mode choke.
https://qrpblog.com/2019/12/a600-v2-0-amplifier-module-changes-and-improvements/

So Razvan has produced an amazing design. How does that apply to us or more to the point ME as this is my thread and as a consequence I can do whatever I wish with it ...
 

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