High power isolators

Latest News and Discussion about the use of the DATV transponder on Es'hail-2
G4WIM
Posts: 257
Joined: Thu Jan 29, 2015 8:36 pm

High power isolators

Post by G4WIM » Thu Aug 08, 2019 3:21 pm

Hi,
as some of you may know I'm organising a group buy of some drop in isolators rated at 200 watt forward and 100watt reflected with a 30dB 100 watt attenuator on the 3rd port. Centred on 2400MHz.
Base unit price is $18 but there are fairly big overhead charges which push the end price up to about £28 each plus P&P Maybe less depending on admin charges and exchange rates

We're currently at the 10 unit price break increasing the order to 15 units would bring the price down to £23.60 each.

If you're interested please let me know asap as I'll be placing an order this weekend.

Regards Tim

g4eml
Posts: 34
Joined: Thu Apr 26, 2018 9:36 am

Re: High power isolators

Post by g4eml » Thu Aug 08, 2019 9:30 pm

Hi Tim,
I am interested in a two.
I have sent you a private message.
73
Colin G4EML.

G4WIM
Posts: 257
Joined: Thu Jan 29, 2015 8:36 pm

Re: High power isolators

Post by G4WIM » Thu Aug 08, 2019 9:41 pm

got it, you're on the list for two and have helped bring the cost down for everyone - thanks

FYI problem is DHL shipping costs at circa $90 plus VAT on goods and various admin fees. Spreading the cost of these overheads really helps everyone.

g0mjw
Posts: 888
Joined: Sat Sep 20, 2014 9:15 am

Re: High power isolators

Post by g0mjw » Thu Aug 08, 2019 10:06 pm

DHL seems very dear?

G4WIM
Posts: 257
Joined: Thu Jan 29, 2015 8:36 pm

Re: High power isolators

Post by G4WIM » Fri Aug 09, 2019 7:06 am

Yes DHL is expensive they quote between $81 and $87 for 1 to 25 units,and there maybe admin charges on top of that at this end, so I'm being cautious in my calculations when figuring the estimated unit cost.

I will be asking if they offer other means of shipping and will pass the savings on if it works ok.

On the plus side for DHL at least we can be sure they will get here in a timely manner and not get lost plus when the cost is spread out across all units / purchasers it becomes more reasonable.

I might order a few extra units at my expense for any 'stragglers' - again this will get the unit cost down for everyone.

Regards Tim

AdrianH
Posts: 20
Joined: Thu Jul 18, 2019 2:46 pm

Re: High power isolators

Post by AdrianH » Fri Aug 09, 2019 9:09 am

Pardon my ignorance but when you say "drop in", I assume you are talking about solder on to PCB's and not connector'ised? Just starting and trying to consider what my options on TX are.

Adrian
G8UGD

g0mjw
Posts: 888
Joined: Sat Sep 20, 2014 9:15 am

Re: High power isolators

Post by g0mjw » Fri Aug 09, 2019 9:15 am

This raises the question on how to use drop in isolators. Any ideas for PCB? See here https://john1ghg.home.xs4all.nl/13%20cm ... -47L-1.jpg
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Mike

G4WIM
Posts: 257
Joined: Thu Jan 29, 2015 8:36 pm

Re: High power isolators

Post by G4WIM » Fri Aug 09, 2019 12:16 pm

Yes drop in are screwed directly to the underlying heatsink and have small tabs which solder to the adjoning PCB trace (s),

Just as in your photo.

I plan on mounting mine directly to the PA output pcb trace with the output N type connector directly above the isolator output tab - so no PCB required.

Any slight mismatch caused by the transition from isolator tab to N type pin will be dealt with by the isolator.

AdrianH
Posts: 20
Joined: Thu Jul 18, 2019 2:46 pm

Re: High power isolators

Post by AdrianH » Fri Aug 09, 2019 12:44 pm

Stick me down for one, please let me know what you require. I will treat it as an insurance for when i get going.

Adrian
G8UGD

G4WIM
Posts: 257
Joined: Thu Jan 29, 2015 8:36 pm

Re: High power isolators

Post by G4WIM » Fri Aug 09, 2019 1:21 pm

Hi Adrian

yes makes for good insurance !
I'll send you pm with details as to how to get on the list.

Regards Tim

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