novaBBS - rec.food.cooking - OT - Calling everyone with EE degrees or equivalent knowledge.

OT - Calling everyone with EE degrees or equivalent knowledge.

<dIFpL.187408$8_id.41402@fx09.iad>

https://www.novabbs.com/interests/article-flat.php?id=241438&group=rec.food.cooking#241438

copy link Newsgroups: rec.food.cooking

Path: i2pn2.org!i2pn.org!usenet.blueworldhosting.com!feed1.usenet.blueworldhosting.com!peer03.iad!feed-me.highwinds-media.com!news.highwinds-media.com!fx09.iad.POSTED!not-for-mail
Newsgroups: rec.food.cooking
From: mxdu...@bell.net (Mike Duffy)
Subject: OT - Calling everyone with EE degrees or equivalent knowledge.
Organization: http://mduffy.x10host.com/index.htm
User-Agent: slrn/1.0.3 (Linux)
Lines: 36
Message-ID: <dIFpL.187408$8_id.41402@fx09.iad>
X-Complaints-To: abuse@blocknews.net
NNTP-Posting-Date: Sat, 24 Dec 2022 16:23:37 UTC
Date: Sat, 24 Dec 2022 16:23:37 GMT
X-Received-Bytes: 1584

by: Mike Duffy - Sat, 24 Dec 2022 16:23 UTC

I need to make a small passive network to
match impedances &c so that I can connect
output from a headphone jack to be the
input for a microphone jack.

I found a simple circuit diagram for
converting Headphone -> Line, and one
to convert Line -> Microphone and then
combined the two to get essentially a
voltage divider then a capacitor:

Headphone ---^v^v^v^v^----+---||----- Mic
| 5K | 1 uF |
----- | -----
--- < ---
- > -
100 <
>
<
+
-----
---
-

I am planning go to my local 'ElectroMike'
shop (I kid you not) to buy the components.

I will probably try to test with a 1 or 2 uF
trim-cap as well as a 5K ohm trim-pot,
but perhaps someone here has done similar
and can save me the time or at least say
if the values look reasonable.

(Mics have impedance ~ 2K, Headphones ~ 8 ohm.)

Re: OT - Calling everyone with EE degrees or equivalent knowledge.

<2890c352-be00-441e-ab05-acd7a136d12bn@googlegroups.com>

copy mid

https://www.novabbs.com/interests/article-flat.php?id=241443&group=rec.food.cooking#241443

copy link Newsgroups: rec.food.cooking

X-Received: by 2002:a05:622a:4d98:b0:3a6:68cb:cac1 with SMTP id ff24-20020a05622a4d9800b003a668cbcac1mr554091qtb.92.1671901349199;
Sat, 24 Dec 2022 09:02:29 -0800 (PST)
X-Received: by 2002:a37:b7c3:0:b0:702:4a94:48e7 with SMTP id
h186-20020a37b7c3000000b007024a9448e7mr465750qkf.578.1671901348992; Sat, 24
Dec 2022 09:02:28 -0800 (PST)
Path: i2pn2.org!i2pn.org!usenet.blueworldhosting.com!feed1.usenet.blueworldhosting.com!peer03.iad!feed-me.highwinds-media.com!news.highwinds-media.com!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: rec.food.cooking
Date: Sat, 24 Dec 2022 09:02:28 -0800 (PST)
In-Reply-To: <dIFpL.187408$8_id.41402@fx09.iad>
Injection-Info: google-groups.googlegroups.com; posting-host=2600:1700:1ff0:e7b0:71be:5b33:201b:81ef;
posting-account=E835_QoAAADIxBzO5OCSWCsTytJpi25A
NNTP-Posting-Host: 2600:1700:1ff0:e7b0:71be:5b33:201b:81ef
References: <dIFpL.187408$8_id.41402@fx09.iad>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <2890c352-be00-441e-ab05-acd7a136d12bn@googlegroups.com>
Subject: Re: OT - Calling everyone with EE degrees or equivalent knowledge.
From: bryangsi...@gmail.com (Bryan Simmons)
Injection-Date: Sat, 24 Dec 2022 17:02:29 +0000
Content-Type: text/plain; charset="UTF-8"
X-Received-Bytes: 2266

by: Bryan Simmons - Sat, 24 Dec 2022 17:02 UTC

On Saturday, December 24, 2022 at 10:23:43 AM UTC-6, Mike Duffy wrote:
> I need to make a small passive network to
> match impedances &c so that I can connect
> output from a headphone jack to be the
> input for a microphone jack.
>
> I found a simple circuit diagram for
> converting Headphone -> Line, and one
> to convert Line -> Microphone and then
> combined the two to get essentially a
> voltage divider then a capacitor:
>
> Headphone ---^v^v^v^v^----+---||----- Mic
> | 5K | 1 uF |
> ----- | -----
> --- < ---
> - > -
> 100 <
> >
> <
> +
> -----
> ---
> -
>
>
> I am planning go to my local 'ElectroMike'
> shop (I kid you not) to buy the components.
>
> I will probably try to test with a 1 or 2 uF
> trim-cap as well as a 5K ohm trim-pot,
> but perhaps someone here has done similar
> and can save me the time or at least say
> if the values look reasonable.
>
> (Mics have impedance ~ 2K, Headphones ~ 8 ohm.)
>
I'm obviously not an EE, because I'd just use
the one pot and call it good enough.

--Bryan

You cannot have a science without measurement. -- R. W. Hamming

interests / rec.food.cooking / OT - Calling everyone with EE degrees or equivalent knowledge.

interests / rec.food.cooking / OT - Calling everyone with EE degrees or equivalent knowledge.

Subject	Author
OT - Calling everyone with EE degrees or equivalent knowledge.	Mike Duffy
Re: OT - Calling everyone with EE degrees or equivalent knowledge.	Bryan Simmons