Classic band "option"

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rodo1
 

Posts: 9
Joined: 13 Jun 2023, 18:16

Classic band "option"

Post by rodo1 »

Hello,
I am a bit confused by the band descriptions. I understand that via the menu system one can choose the classic bands option, but do the different band options require different PC boards, or is the board stack the same for all band options?
Also, I understand the design is optimized for 80-20m, and not to expect great performance on the higher bands. However, does using the classic menu choice degrade the 80-20m performance?
When ordering a kit from one of the listed vendors, does one need to specify which band option will be the one being used?
Thanks!

Bob WB0POQ
s57l
 

Posts: 60
Joined: 30 Dec 2021, 21:30

Re: Classic band "option"

Post by s57l »

(tr)usdx has 5 bands, there are 3 options. not stackable.
https://dl2man.de/2-trusdx-assembly/
in the menu you select, what hardware you have, which rf board.
73 gl
rodo1
 

Posts: 9
Joined: 13 Jun 2023, 18:16

Re: Classic band "option"

Post by rodo1 »

Thanks for the info, but I'm still unclear about if the RF PCB is the same for all band choices and only coil and cap values are different or if there are unique and different (different copper traces, vias, etc.) PCBs for the Classic, High, Low etc. bands.
Some web sites I have visited have verbiage that strongly suggest there are significant layout, trace patterns, via placements etc. for the different band choices, albeit, most appear to be non English first language writers, so it may be due to my poor interpretation of the text.

Bob
DL2MAN
 

Posts: 712
Joined: 30 Dec 2021, 19:18
Contact:

Re: Classic band "option"

Post by DL2MAN »

It´s the same PCB for all Variants.
Only Filter caps and coils are different as well as PA Fet used.

73 Manuel; DL2MAN
DV1K-PH
 

Posts: 1
Joined: 11 Jul 2023, 03:13

Re: Classic band "option"

Post by DV1K-PH »

Any links for Asia? Sellers of the kits?
Last edited by DV1K-PH on 13 Jul 2023, 01:05, edited 1 time in total.
DL2MAN
 

Posts: 712
Joined: 30 Dec 2021, 19:18
Contact:

Re: Classic band "option"

Post by DL2MAN »

Good Morning,

As mentioned several times before:
High Band and Classical Bands RF Boards are only available as Kits.
There´s too much tuning involved to provide this assembled.

If anyone wants to provide that service, I have nothing against it, but from my side there are no intentions in that direction. After all: (tr)uSDX was intended as DIY Kit and where´s a will there´s a way.
So: If you really want it, maybe it´s time starting to learn how to solder.

73 Manuel; DL2MAN
chancekp
 

Posts: 3
Joined: 15 Feb 2023, 21:03

Re: Classic band "option"

Post by chancekp »

I’ve built my kit but it did not come with the 3 PA FETs. Am I supposed to de-solder the FETs from the standard board and re-solder them onto the Classic board?

Thanks.

Kevin, KN6WKm
Luca66
 

Posts: 123
Joined: 16 Apr 2022, 13:02

Re: Classic band "option"

Post by Luca66 »

chancekp wrote: 20 Jul 2023, 00:13 I’ve built my kit but it did not come with the 3 PA FETs. Am I supposed to de-solder the FETs from the standard board and re-solder them onto the Classic board?

Thanks.

Kevin, KN6WKm
Hi Kevin, on the rf board, on the opposite side au toroids, you have to see the fet with three contacts already soldered.
73
chancekp
 

Posts: 3
Joined: 15 Feb 2023, 21:03

Re: Classic band "option"

Post by chancekp »

The IC marked "DB15AB, 86256" is the PA FET?
Luca66
 

Posts: 123
Joined: 16 Apr 2022, 13:02

Re: Classic band "option"

Post by Luca66 »

chancekp wrote: 20 Jul 2023, 13:50 The IC marked "DB15AB, 86256" is the PA FET?
The potency FET is usually identified as FDT86256.
73 Luca.
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