[Boatanchors] Fw: Boatanchors Digest, Vol 80, Issue 35
Henry Mei'l's
meils at get2net.dk
Wed Sep 15 15:17:18 EDT 2010
Here it is Sandy:
ARRL's "Hints and Kinks for the Radio Amateur," Volume Five, Copyright 1954
(Library of Congress .... Number:33-14685)
Page 26: ADDING SELECTIVITY BY MECHANICAL MEAN --William Bruce Cameron
(Don't have a scanner but have access to one.)
I built these units back around 1976 and again recently.
BTW does anyone have access to Vol. I-IV of Hints and Kinks -
I would definitely appreciate a PDF copy or link to such ;0)Pe
ARRL members might have access to them and/or the item
cited above. No longer member but considering rejoining.
73s Henry, oz1uf-ou5t / x-k2uoc
----- Original Message -----
From: "Henry Mei'l's" <meils at get2net.dk>
To: <boatanchors at mailman.qth.net>
Sent: Wednesday, September 15, 2010 7:13 PM
Subject: Re: Boatanchors Digest, Vol 80, Issue 35
> Sandy,
> I have descriptions of HB tuned speakers.
> Will post the referece on this reflector later.
>
> 73 Henry, OZ1uF Cph (exK2UOC Bklyn)
>
>
> ----- Original Message -----
> From: <boatanchors-request at mailman.qth.net>
> To: <boatanchors at mailman.qth.net>
> Sent: Wednesday, September 15, 2010 6:00 PM
> Subject: Boatanchors Digest, Vol 80, Issue 35
>
>
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>> When replying, please edit your Subject line so it is more specific
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>>
>> Today's Topics:
>>
>> 1. FS: *NEW* Unique Drake Service Supplement CD (Garey Barrell)
>> 2. Info on acoustically tuned loudspeakers? (Sandy)
>> 3. Wanted: 400 pf Air Variable Cap (Howard)
>> 4. Re: [Glowbugs] Info on acoustically tuned loudspeakers?
>> (Jim Larsen - AL7FS)
>> 5. Re: [Glowbugs] Info on acoustically tuned loudspeakers?
>> Resonant Speaker (Jim Larsen - AL7FS)
>> 6. Heathkit Q-Multiplier With Drake 2-B Receiver (Michael D. Harmon)
>> 7. Transmitter comparisons and a question. (Curt)
>> 8. Re: Heathkit Q-Multiplier With Drake 2-B Receiver (Greg Mijal)
>> 9. Re: Transmitter comparisons and a question. (Carl)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 14 Sep 2010 17:37:23 -0400
>> From: Garey Barrell <k4oah at mindspring.com>
>> Subject: [Boatanchors] FS: *NEW* Unique Drake Service Supplement CD
>> To: Boatanchors at mailman.qth.net
>> Message-ID: <4C8FEB13.5080401 at mindspring.com>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> I've had several inquiries regarding a CD for the 2-C / 2-NT pair. The
>> CD is now available for $25
>> to US addresses!
>>
>> Here is the information that Drake left out of their manuals!
>>
>> Unique supplemental service information CD available for the Drake 2-C
>> and 2-NT
>>
>> High resolution color photos of the under chassis and individual PC
>> boards of each unit, with all
>> parts identified and keyed to a parts list make it easy to locate any
>> component. No more trying to
>> trace wires through bundles, etc. This information is not available
>> elsewhere and really makes a
>> difference in servicing these units.
>>
>> These CDs are NOT just scans of the original manuals that were included
>> with the equipment when new.
>> High resolution scans of the original manuals ARE on the CDs.
>>
>> Of course the rest of the CDs are still available, the 2-B, B-Line,
>> C-Line, TR-4 and TR-4C/Cw/CwRIT.
>> Samples of these pages (at reduced resolution) and purchase information
>> are at <www.k4oah.com>.
>>
>> --
>> 73, Garey - K4OAH
>> Glen Allen, VA
>>
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Tue, 14 Sep 2010 17:25:22 -0500
>> From: "Sandy" <ebjr37 at charter.net>
>> Subject: [Boatanchors] Info on acoustically tuned loudspeakers?
>> To: <tetrode at googlegroups.com>, <boatanchors at mailman.qth.net>
>> Message-ID: <485EB06109A84FBCA660571E19618679 at gateway>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> Anybody got any data on calculating dimensions of tuned speaker tubes? I
>> 'hade" some data somewhere, but lost it.....dammit.
>>
>> Need to take a small round speaker and build a CW "filter" for around 700
>> Hz
>> or so. Last one I built was 10 years ago and it worked really well
>> without
>> a lot of "ring".
>>
>> 73,
>>
>> Sandy W5TVW
>>
>> PS: Have a used but excellent FT-990 that was given to me and it works
>> super although it is kinda big for the small desk in my bedroom! Been
>> hanging around 7050 afternoons and sometimes on 3546.5 or so early
>> evenings.
>> (01-03Z about)
>>
>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Tue, 14 Sep 2010 18:53:45 -0400
>> From: Howard <wa2afd at gmail.com>
>> Subject: [Boatanchors] Wanted: 400 pf Air Variable Cap
>> To: boatanchors at mailman.qth.net
>> Message-ID:
>> <AANLkTim3Ge+XhTx2+mqqxRpfkMPWmeZrXP3bkHpEXms4 at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> Hello to all. I am looking to buy an air variable cap roughly 20-400 pf
>> to
>> complete a homebrew antenna tuner. Must have spacing wide enough to
>> pass
>> along 100 watts.
>>
>> Thanks in advance.
>>
>> 73 de W2AFD Howard
>>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Tue, 14 Sep 2010 18:13:31 -0800
>> From: Jim Larsen - AL7FS <jimlarsen2002 at alaska.net>
>> Subject: Re: [Boatanchors] [Glowbugs] Info on acoustically tuned
>> loudspeakers?
>> To: tetrode at googlegroups.com, boatanchors at mailman.qth.net
>> Message-ID: <4C902BCB.7080700 at alaska.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> http://www.io.com/~n5fc/res_spkr.htm
>>
>> Here is one source of info.
>>
>> Jim Larsen, AL7FS
>> Anchorage Alaska
>> 907-345-3190
>> http://www.AL7FS.us/
>>
>>
>> On 9/14/2010 2:25 PM, Sandy wrote:
>>> Anybody got any data on calculating dimensions of tuned speaker tubes?
>>> I 'hade" some data somewhere, but lost it.....dammit.
>>
>>> Sandy W5TVW
>>
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Tue, 14 Sep 2010 18:22:47 -0800
>> From: Jim Larsen - AL7FS <jimlarsen2002 at alaska.net>
>> Subject: Re: [Boatanchors] [Glowbugs] Info on acoustically tuned
>> loudspeakers? Resonant Speaker
>> To: tetrode at googlegroups.com, boatanchors at mailman.qth.net
>> Message-ID: <4C902DF7.3000202 at alaska.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> http://kd1jv.qrpradio.com/resonatespkr/CWSPKR.HTM
>>
>> Jim Larsen, AL7FS
>> Anchorage Alaska
>> 907-345-3190
>> http://www.AL7FS.us/
>>
>>
>> On 9/14/2010 2:25 PM, Sandy wrote:
>>> Anybody got any data on calculating dimensions of tuned speaker tubes?
>>> I 'hade" some data somewhere, but lost it.....dammit.
>>
>>
>> ------------------------------
>>
>> Message: 6
>> Date: Tue, 14 Sep 2010 22:25:23 -0500
>> From: "Michael D. Harmon" <mharmon at att.net>
>> Subject: [Boatanchors] Heathkit Q-Multiplier With Drake 2-B Receiver
>> To: Boatanchors Mailing List <boatanchors at mailman.qth.net>
>> Message-ID: <4C903CA3.7020708 at att.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> I've recently come into possession of a nice Drake 2-B receiver. It
>> came with no accessories, and I'd like to find a Q-multiplier for it.
>> Unfortunately, the Drake 2-BQ units seem to be made of gold these days.
>> The ones I've seen on E-Pay are bringing $150 or more (more than I paid
>> for the receiver!).
>>
>> Over the years, Heathkit produced a Q-multiplier kit under at least 3
>> model numbers (GD-125, HD-11, QF-1). All were fundamentally the same
>> design, but with different packaging. They show up from time to time on
>> E-Pay at very reasonable prices (at least compared to the Drake unit).
>> I'd like to know how these Heath units compare to the Drake 2-BQ. It
>> would seem that a Q-multiplier designed for a 455 kHz IF frequency
>> should be effective if connected into the circuit at the 455 kHz IF
>> point (between the 2nd and 3rd mixers in the 2-B), but there may be
>> other issues I'm not considering. Anyone ever used a Heathkit
>> Q-multiplier with a Drake 2-B? Good idea? Bad idea?
>>
>> I'd appreciate any comments or suggestions any of you might have.
>>
>> Thanks,
>> Mike Harmon, WB0LDJ
>> mharmon at att dot net
>>
>>
>> ------------------------------
>>
>> Message: 7
>> Date: Wed, 15 Sep 2010 07:24:49 -0500
>> From: "Curt" <rhulett1 at comcast.net>
>> Subject: [Boatanchors] Transmitter comparisons and a question.
>> To: <boatanchors at mailman.qth.net>
>> Message-ID: <7A8A9E70EEC14A88A154F2F01EA51D7E at curte7d33a8d83>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> Well, had first QSO yesterday with new to me DX-20 on 40M. As expected,
>> it
>> performs about the same as the Eico 723, the two seem nearly identical in
>> design and implementation. I've read that the Eico's transformer may be
>> a
>> little more rugged. Neither of them like HC49 crystals, which is what
>> most
>> of the available FT243s are. Both rigs chirp like a canary with the
>> small
>> HC49, but an HC6U or real FT243 produces a clean signal.
>>
>> The next candidate on the bench is a Globe Scout 680, which appears to be
>> intact and in good cosmetic condition. Since it uses a 6V6 as the
>> oscillator, I'm anticipating even more of a tendency to chirp.
>>
>> My question is whether there is a way to make the HC49 crystals useable
>> in
>> these oscillators? The seller indicated they work fine in any rig with
>> less
>> than 40ma crystal current, so obviously the DX-20 and Eico 723 have
>> higher
>> than that.
>>
>> 73, Curt KB5JO
>>
>>
>>
>> ------------------------------
>>
>> Message: 8
>> Date: Wed, 15 Sep 2010 09:02:43 -0400
>> From: "Greg Mijal" <bluebirdtele at embarqmail.com>
>> Subject: Re: [Boatanchors] Heathkit Q-Multiplier With Drake 2-B
>> Receiver
>> To: "Michael D. Harmon" <mharmon at att.net>, "Boatanchors Mailing List"
>> <boatanchors at mailman.qth.net>
>> Message-ID: <82568AD0E35E44919C7A429F695702B4 at GregMijalPC>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I ran a 2A and Heathkit QF-1 together for some time. Worked fine.
>> 73's
>> Greg
>> WA7LYO
>> Kinston NC
>> ----- Original Message -----
>> From: "Michael D. Harmon" <mharmon at att.net>
>> To: "Boatanchors Mailing List" <boatanchors at mailman.qth.net>
>> Sent: Tuesday, September 14, 2010 11:25 PM
>> Subject: [Boatanchors] Heathkit Q-Multiplier With Drake 2-B Receiver
>>
>>
>>> I've recently come into possession of a nice Drake 2-B receiver. It
>>> came with no accessories, and I'd like to find a Q-multiplier for it.
>>> Unfortunately, the Drake 2-BQ units seem to be made of gold these days.
>>> The ones I've seen on E-Pay are bringing $150 or more (more than I paid
>>> for the receiver!).
>>>
>>> Over the years, Heathkit produced a Q-multiplier kit under at least 3
>>> model numbers (GD-125, HD-11, QF-1). All were fundamentally the same
>>> design, but with different packaging. They show up from time to time on
>>> E-Pay at very reasonable prices (at least compared to the Drake unit).
>>> I'd like to know how these Heath units compare to the Drake 2-BQ. It
>>> would seem that a Q-multiplier designed for a 455 kHz IF frequency
>>> should be effective if connected into the circuit at the 455 kHz IF
>>> point (between the 2nd and 3rd mixers in the 2-B), but there may be
>>> other issues I'm not considering. Anyone ever used a Heathkit
>>> Q-multiplier with a Drake 2-B? Good idea? Bad idea?
>>>
>>> I'd appreciate any comments or suggestions any of you might have.
>>>
>>> Thanks,
>>> Mike Harmon, WB0LDJ
>>> mharmon at att dot net
>>> ______________________________________________________________
>>> Boatanchors mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Boatanchors at mailman.qth.net
>>>
>>> List Administrator: Duane Fischer, W8DBF
>>> ** For Assistance: dfischer at usol.com **
>>>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>
>>
>> ------------------------------
>>
>> Message: 9
>> Date: Wed, 15 Sep 2010 09:32:06 -0400
>> From: "Carl" <km1h at jeremy.mv.com>
>> Subject: Re: [Boatanchors] Transmitter comparisons and a question.
>> To: "Curt" <rhulett1 at comcast.net>, <boatanchors at mailman.qth.net>
>> Message-ID: <005201cb54da$66691ec0$6501a8c0 at DAVES>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> Id start by measuring the crystal current and then reducing the
>> oscillator
>> power down until the chirp stops. You may or may not have enough drive to
>> the next stage. In that case build a SS oscillator inside the rig and
>> use
>> the tube oscillator as a buffer/amp.
>>
>> Or build a SS VFO and quit wasting money on crystals (-;
>>
>> Carl
>> KM1H
>>
>>
>>
>> ----- Original Message -----
>> From: "Curt" <rhulett1 at comcast.net>
>> To: <boatanchors at mailman.qth.net>
>> Sent: Wednesday, September 15, 2010 8:24 AM
>> Subject: [Boatanchors] Transmitter comparisons and a question.
>>
>>
>>> Well, had first QSO yesterday with new to me DX-20 on 40M. As expected,
>>> it
>>> performs about the same as the Eico 723, the two seem nearly identical
>>> in
>>> design and implementation. I've read that the Eico's transformer may be
>>> a
>>> little more rugged. Neither of them like HC49 crystals, which is what
>>> most
>>> of the available FT243s are. Both rigs chirp like a canary with the
>>> small
>>> HC49, but an HC6U or real FT243 produces a clean signal.
>>>
>>> The next candidate on the bench is a Globe Scout 680, which appears to
>>> be
>>> intact and in good cosmetic condition. Since it uses a 6V6 as the
>>> oscillator, I'm anticipating even more of a tendency to chirp.
>>>
>>> My question is whether there is a way to make the HC49 crystals useable
>>> in
>>> these oscillators? The seller indicated they work fine in any rig with
>>> less
>>> than 40ma crystal current, so obviously the DX-20 and Eico 723 have
>>> higher
>>> than that.
>>>
>>> 73, Curt KB5JO
>>>
>>> ______________________________________________________________
>>> Boatanchors mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Boatanchors at mailman.qth.net
>>>
>>> List Administrator: Duane Fischer, W8DBF
>>> ** For Assistance: dfischer at usol.com **
>>>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>>
>> ------------------------------
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>> End of Boatanchors Digest, Vol 80, Issue 35
>> *******************************************
>
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