EMRFD Message Archive 293
Message Date From Subject 293 2007-01-03 10:20:17 Alexandre Veiga -... Toroid FT37-77 Hello,
May name is Alexandre and my call is PY4EU. I'm a homebrewer and today a
was mount a QRP wattmeter published in QST magazine (febuary/1990). This
circuit uses three toroids FT37-77 in a direcional coupler and one unit of
toroid was broken. Can anybody help me? in Brazil don't have this toroid in
electronic shops.
73,
Alexandre Veiga - PY4EU
http://www.py4eu.qsl.br
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http://br.yahoo.com/mailbeta/tudonovo/294 2007-01-03 10:30:20 Terry WAØITP Re: Toroid FT37-77 Hi Alexandre,If it not broken into many pieces you can glue it back together wasnd it should still be useable..
----- Original Message -----295 2007-01-03 15:35:37 Alexandre Veiga -... RES: [emrfd] Toroid FT37-77 Attachments :Terry,Unhappyly a piece if lost, will have that to buy another one.
73, Alexandre PY4EU-----Mensagem original-----
De: emrfd@yahoogroups.com [mailto:emrfd@yahoogroups.com]Em nome de Terry WAØITP
Enviada em: quarta-feira, 3 de janeiro de 2007 16:25
Para: emrfd@yahoogroups.com
Assunto: Re: [emrfd] Toroid FT37-77Hi Alexandre,If it not broken into many pieces you can glue it back together wasnd it should still be useable..
----- Original Message -----296 2007-01-03 16:25:42 Don AE5K Re: RES: [emrfd] Toroid FT37-77 Alexandre Veiga - PY4EU wrote:
> Terry,Alexandre,
>
> Unhappyly a piece if lost, will have that to buy another one.
>
>
> 73, Alexandre PY4EU
Are you sure you're using the correct part number? The Feb. 1990
article shows three FT37-72 toroids and the wording "do not substitute".
Don AE5K297 2007-01-03 18:10:26 Nick Kennedy Re: RES: [emrfd] Toroid FT37-77 Yeah, Don--I built that meter several years back and the 72 cores were out of production. The 77 cores seemed to be the best replacement choice at the time.
72--Nick, WA5BDUOn 1/3/07, Don AE5K <don@ae5k.us> wrote:Alexandre Veiga - PY4EU wrote:
> Terry,
>
> Unhappyly a piece if lost, will have that to buy another one.
>
>
> 73, Alexandre PY4EU
Alexandre,
Are you sure you're using the correct part number? The Feb. 1990
article shows three FT37-72 toroids and the wording "do not substitute".
Don AE5K
299 2007-01-04 07:43:23 Alexandre Veiga -... RES: RES: [emrfd] Toroid FT37-77 Don,
This article was published in many maganizes including in Brazil, it's work
with FT37-72 and FT 37-77 because this core permeability is equal (2000).
Renato, PY2RLM mount a wattmeter using -77 core and it's work fine.
73,
Alexandre Veiga - PY4EU
http://www.py4eu.qsl.br
-----Mensagem original--