Re: Topband: BOG pre amp info ?

YRO > > > _ > > From: Don Kirk [mailto:wd8...@gmail.com] > Sent: 27 November 2017 13:09 > To: Roger Kennedy > Cc: topband > Subject: Re: Topband: BOG pre amp info ? > > > > HI Roger, > > > You said "However, the circuit seems od

Re: Topband: BOG pre amp info ?

i 40 m. Aby však mělo použití ... Od: Topband <topband-boun...@contesting.com> v mene používateľa Tim Shoppa <tsho...@gmail.com> Odoslané: 27. novembra 2017 15:03:26 Komu: Roger Kennedy Kópia: topBand List Predmet: Re: Topband: BOG pre amp info

Re: Topband: BOG pre amp info ?

ught it was > about 50 ohms. > > Guess I'm wrong then ! Sorry about that. > > (I already built a FET pre-amp for my Loop . . . but was just commenting.) > > 73 Roger G3YRO > > > _ > > From: Don Kirk [mailto:wd8...@gmail.com] > Sent: 27 November 2017 13:09 >

Topband: BOG pre amp info ?

built a FET pre-amp for my Loop . . . but was just commenting.) 73 Roger G3YRO _ From: Don Kirk [mailto:wd8...@gmail.com] Sent: 27 November 2017 13:09 To: Roger Kennedy Cc: topband Subject: Re: Topband: BOG pre amp info ? HI Roger, You said "However, the circuit seem

Re: Topband: BOG pre amp info ?

HI Roger, You said "However, the circuit seems odd . . . I used transformers in and out on my Loop Preamp, to give a match to 50 ohms." I believe your above statement was in reference to the W7IUV preamp. I've measured the W7IUV preamp input and output impedances and also modeled the W7IUV

Topband: BOG pre amp info ?

That's a nice cheap board, and worth using considering it has relay switching too . . . However, the circuit seems odd . . . I used transformers in and out on my Loop Preamp, to give a match to 50 ohms. Roger G3YRO ---

Re: Topband: BOG pre amp info ?

opband@contesting.com Sent: Wed, 22 Nov 2017 12:01:32 - (GMT) Subject: Re: Topband: BOG pre amp info ? I use a KD9SV pre-amp for my reversible beverage on the ground (RBOG) available from DX Engineering (DXE Part number: SVP-SV-PP160RBOG). It is not a kit. Pre-amp works very well, is low noise and ha

Re: Topband: BOG pre amp info ?

I use a KD9SV pre-amp for my reversible beverage on the ground (RBOG) available from DX Engineering (DXE Part number: SVP-SV-PP160RBOG). It is not a kit. Pre-amp works very well, is low noise and has 20db of gain As for height, the experts say laying on the ground or a couple of inches. I am

Re: Topband: BOG pre amp info ?

On Tue, Nov 21, 2017 at 6:14 PM, Mike Waters wrote: > Something quite similar to the W7IUV is what I've used for years. See > www.w0btu.com/W0BTU-broadband-preamps.html > > BTW, I just removed his IMD improvement mod yesterday, hoping to see if > the lower noise figure helped

Re: Topband: BOG pre amp info ?

Per Larrys comment, to the best of my knowledge the most current W7IUV design is captured in his Revision 5 document, and the schematic within this document that's the most current design is identified as follows: Revised 13Sep09. Here is a link to Revision 5 document:

Re: Topband: BOG pre amp info ?

Larry, W7IUV, made some changes to the design over the years. It's important to find the latest recommended component valves for optimum preamp performance. GL - Steve WB6RSE _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: BOG pre amp info ?

I agree with Jim Murray that the W7IUV would be a good preamp to try with your BOG. I know of at least one online company that sells the parts and circuit board for the W7IUV preamp and here is their URL http://www.mtmscientific.com/preamp.html I built a couple of the W7IUV preamps, and made my

Topband: BOG pre amp info ?

hello i am still looking for a pre amp for my BOG antenna 61 meter long is any one can recommend something that do work nice with the BOG thank you kind 73 elan g0uut is any one can tell me if i lift the bog above ground what benefit i will get  if so how high from the ground ? _