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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+BOG\s+pre\s+amp\s+info\s+\?\s*$/: 13 ]

Total 13 documents matching your query.

1. Topband: BOG pre amp info ? (score: 1)
Author: "E.P" <paimg0uut@btinternet.com>
Date: Tue, 21 Nov 2017 20:57:02 +0000 (UTC)
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
/archives//html/Topband/2017-11/msg00096.html (6,876 bytes)

2. Re: Topband: BOG pre amp info ? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 21 Nov 2017 17:52:05 -0500
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
/archives//html/Topband/2017-11/msg00099.html (7,812 bytes)

3. Re: Topband: BOG pre amp info ? (score: 1)
Author: wb6rse1@mac.com
Date: Tue, 21 Nov 2017 15:38:52 -0800
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 _________________ Topban
/archives//html/Topband/2017-11/msg00100.html (6,891 bytes)

4. Re: Topband: BOG pre amp info ? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 21 Nov 2017 18:54:56 -0500
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 identifi
/archives//html/Topband/2017-11/msg00101.html (8,340 bytes)

5. Re: Topband: BOG pre amp info ? (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Tue, 21 Nov 2017 18:15:52 -0600
_________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2017-11/msg00102.html (8,024 bytes)

6. Re: Topband: BOG pre amp info ? (score: 1)
Author: EdG <n4oc@mac.com>
Date: Wed, 22 Nov 2017 07:01:32 -0500
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
/archives//html/Topband/2017-11/msg00103.html (7,225 bytes)

7. Re: Topband: BOG pre amp info ? (score: 1)
Author: MR TREVOR DUNNE <ei2glb@eircom.net>
Date: Wed, 22 Nov 2017 17:29:32 +0000 (GMT)
Try this guy he does good quality boards and it's easier than importing from the states, https://m.ebay.co.uk/itm/W7IUV-Beverage-preamplifier-PCB-for-experimenters-2N5109-or-DCP68-transistor-/2616340
/archives//html/Topband/2017-11/msg00104.html (8,227 bytes)

8. Topband: BOG pre amp info ? (score: 1)
Author: "Roger Kennedy" <roger@wessexproductions.co.uk>
Date: Mon, 27 Nov 2017 05:37:05 -0500
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 oh
/archives//html/Topband/2017-11/msg00119.html (6,750 bytes)

9. Re: Topband: BOG pre amp info ? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Mon, 27 Nov 2017 08:09:13 -0500
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 pr
/archives//html/Topband/2017-11/msg00120.html (8,037 bytes)

10. Topband: BOG pre amp info ? (score: 1)
Author: "Roger Kennedy" <roger@wessexproductions.co.uk>
Date: Mon, 27 Nov 2017 09:47:16 -0500
Hi Don Gosh, really? Looking at the circuit, and given the resistors used, I would have thought the input impedance would be about 800 ohms . . . And hard to estimate the output impedance, but wouldn
/archives//html/Topband/2017-11/msg00124.html (9,249 bytes)

11. Re: Topband: BOG pre amp info ? (score: 1)
Author: Tim Shoppa <tshoppa@gmail.com>
Date: Mon, 27 Nov 2017 10:03:26 -0500
Input impedance on the W7IUV preamp is determined almost entirely by the DC bias currents. Clifton Labs used to have a really nifty set of pages on modeling and measurement of the various high perfor
/archives//html/Topband/2017-11/msg00127.html (11,012 bytes)

12. Re: Topband: BOG pre amp info ? (score: 1)
Author: Jan Babinec <om2xw@hotmail.com>
Date: Mon, 27 Nov 2017 15:23:24 +0000
Hi Tim, K8ZOA's file are available here https://www.okdxf.eu/index.php/technika 73 Jan OM2XW Technika - okdxf.eu<https://www.okdxf.eu/index.php/technika> www.okdxf.eu Zvlátní pijímací anténa (Beverag
/archives//html/Topband/2017-11/msg00128.html (11,891 bytes)

13. Re: Topband: BOG pre amp info ? (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Mon, 27 Nov 2017 17:01:02 +0000
Hello Tim and all. The input impedance of the W7IUV amp is also highly dependent on the negative feedback found by looking at the unbypassed base bias circuit. And highly dependent on the size of the
/archives//html/Topband/2017-11/msg00129.html (11,892 bytes)

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