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RE: LF: BFQ19 SMT Collector pad

from [Ken] [Permanent Link][Original]
To: <[email protected]>
Subject: RE: LF: BFQ19 SMT Collector pad
From: "Ken" <[email protected]>
Date: Sun, 29 Apr 2012 12:50:52 +0100
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In-reply-to: <2BB37ECFB44044EFACB44777CD3A2963@AGB>
References: <28E264A70BC6433AB06D915D0EAFB8B9@AGB> <op.wdisxbkcyzqh0k@pc-roelof> <2BB37ECFB44044EFACB44777CD3A2963@AGB>
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Thread-index: Ac0l7dG+AColHaKcTfSZO9WTLpGaiQADvN8g 
Hello Graham.
Can you remember the name of the web site where the layout was?, I did my
own layout but it was not all that successful when tested on 198kHz S/N
improved but no increase in level, although this may have been because I
wound two 20mH inductors for the power feed and may have been too greater
inter-winding capacitance, for use on VLF.

73s
Ken

M0KHW   IO91TV  

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Graham
Sent: 29 April 2012 10:52
To: [email protected]
Subject: Re: LF: BFQ19 SMT Collector pad 

Ok  , Tnx , Roelof,

I thought that  may be the  case, but  before  doing it , best  to ask ...

I have a pcb layout (from web)  for  a  mini-whip   Ae  and after your post 
, that the  bfq19 is a better  option, was going to alter the  track to 
take the  surface mount device, would  need  to  be on the  track  side  of 
the  board.  At 1.5 mm  pitch  will  not be that  simple !

Q there a  commercial  PCB  available ?

73 -G.

--------------------------------------------------
From: "Roelof Bakker" <[email protected]>
Sent: Sunday, April 29, 2012 10:35 AM
To: <[email protected]>
Subject: Re: LF: BFQ19   SMT   Collector  pad

> Hello Graham,
>
> I use them a lot and yes, you can solder the collector tap, which is 
> preferred for better heat transfer.
> For best contact, I solder both sides of the collector.
>
> 73,
> Roelof, pa0rdt
>
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