想做一个简单的电台，如何入手？？ [复制链接]

我的rockmite的钱划掉了,但是卖家还没有确认收到.

第02页 绪论


introduction by tony - g4wif.

every so often a design captures the imagination of the qrp world.
in 1982, george burt - gm3oxx described the "foxx" in the
summer 1983 edition of sprat. his transceiver used only 5
transistors yet it featured both sidetone and r.i.t. this was
probably the first qrp transceiver in history to use the same
bipolar device as the transmit pa and the receiver mixer. since
then, designs of a similar nature appeared from both europe and
the usa. as the concept was continually improved, it became better
known as "the pixie".

in 2001 a new qrp club called "qrpp international" was formed.
their website says "qrpp-i is a club for amateur radio operators
around the world to share their experience and knowledge as well
as help others learn about the lowest power (less than 1 watt) and
most fun aspect of amateur radio".

in the fall of 2001, brice d. hornback - ka8mav of qrpp-i decided
to document the history and evolution of the pixie.

this document from the gqrp club forms part of that history
through articles that have appeared in sprat from 1982 to the
present day.

to learn more about gqrp and qrpp-i visit our websites at:-
www.gqrp.com & www.qrpp-i.com

"pixie 2 - an update" appears with the kind permission of doug hendricks
ki6ds. this article first appeared in qrpp june 1995.



  绪论

  tony，呼号为g4wif

  在一个偶然的机会，一个设计引发了qrp世界的梦想。在1982年，george burt，呼号为gm3oxx描述了“foxx”，它被发表在1983年夏季版的《sprat》上。他的收发机仅使用了5个晶体管，但它精选了sidetone与r.i.t。它使用同样的三极管作为发射机pa与接收机混频器，这可能是历史上的第一台这样的qrp收发机。从那以后，相似的设计自然而然地出现在欧美。因为这个构想在不断地完善，这就成了广为人知的“the pixie”。

  在2001年，一个叫“qrpp international”的新的的qrp俱乐部成立了。他们的网站宣称：“qrpp-i是一个在世界各地的业余无线电操作者的俱乐部，俱乐部的人们分享他们的经验与知识，同样也帮助其它人来学习低功率（小于1瓦），并获得使用业务无线电的更多的乐趣。”

  在2001年的秋季，brice d. hornback，在qrpp-i里的ka8mav决定来归档pixie的历史与演变。

  本文摘自gqrp俱乐部的历史文章，它们发表在从1982年到现在的《sprat》上。

  想了解更多的关于gqrp与qrpp-i，请访问我们的网站：
http://www.gqrp.com/   （译者注：超时。上网条件：深圳电信adsl，带宽2m。）
http://www.qrpp-i.com/ （译者注：可以访问）

  “pixie 2——升级版”的出版获得了doug hendricks，呼号为ki6ds的善意的许可。本文第一版在1995年6月发表在qrpp上。

'

我的rockmite的钱划掉了,但是卖家还没有确认收到.

'
再等等看吧

'

  绪论
  tony，呼号为g4wif
  在一个偶然的机会，一个设计引发了qrp世界的梦想。在1982年，george burt，呼号为gm3oxx描述了“foxx”，它被发表在1983年夏季版的《sprat》上。他的收发机仅使用了5个晶体管，但它精选了sidetone与r.i.t。它使用同样的三极管作为发射机pa与接收机混频器，这可能是历史上的第一台这样的qrp收发机。从那以后，相似的设计自然而然地出现在欧美。因为这个构想在不断地完善，这就成了广为人知的“the pixie”。
  在2001年，一个叫“qrpp international”的新的的qrp俱乐部成立了。他们的网站宣称：“qrpp-i是一个在世界各地的业余无线电操作者的俱乐部，俱乐部的人们分享他们的经验与知识，同样也帮助其它人来学习低功率（小于1瓦），并获得使用业务无线电的更多的乐趣。”
  在2001年的秋季，brice d. hornback，在qrpp-i里的ka8mav决定来归档pixie的历史与演变。
  本文摘自gqrp俱乐部的历史文章，它们发表在从1982年到现在的《sprat》上。
  想了解更多的关于gqrp与qrpp-i，请访问我们的网站：
http://www.gqrp.com/   （译者注：超时。上网条件：深圳电信adsl，带宽2m。）
http://www.qrpp-i.com/ （译者注：可以访问）
  “pixie 2——升级版”的出版获得了doug hendricks，呼号为ki6ds的善意的许可。本文第一版在1995年6月发表在qrpp上。

'

谢谢，受益匪浅

'

买台二手的坏ft80c,先照图维修,修不好拆零件diy,修复一新了卖掉,再买一台,直到遇到修不好的再拆零件diy吧

'


就是就是

第03页


the foxx minitransceiver      george burt gm30xx
[a transceiver on a 2’×2’ pcb]

after chatting to people at the club stand during the r.s.g.b. hf convention at the n.e.c. , it was obvious that what was needed was a simple transceiver with no expensive or hard to get bits, like md108s. the first thing was to build a very simple transmitter, then try to convert it into a transceiver.

the stx was built and several separate receiver sections were tried without much luck. then by sitting and looking at the stx circuit, the idea of using the pa as a detector came to mind. why not, after all it is only two diodes. so the pcb was cut and a 47k ohm pot was connected to the emitter along with an audio amplifier. great, it worked, next step was to wire in a toggle switch. with it spread all over the bench and a quickly made mini z match for the rf coil, on loading up it gave 5/2 watts of rf out on 40 metres. using r* the drive was reduced to one watt out. try to leave some r* in circuit otherwise the bc108 will be working very hard.

after a quick cq call, back came a la6, followed by frank, on5ag and g4gxi, peter, both club members. a trim pot of 5k ohm had been wired in the receiver side to try and adjust the oscillator injection for the pa/detector. it was found that it altered the driver until the oscillator stopped, but better still it altered the frequency. on 40 metres, with the series crystal capacitor at full value it pulled the crystal by 1.5khz before it stopped, now we had irt as well, on 20 metres it pulled the frequency by 3khz. alas on 80 metres, it pulled the frequency by only 400hz, still you cannot win 'em all!

the other nice benefit that turned up was on transmit. when there is no detector thump and the audio left on, a smooth click side-tone is produced. it is even possible on receive to zero beat, depress the key and this shorts out the irt control, and one can tune on the crystal capacitor.

now what more could you want? a simple transceiver with crude irt and side-tone with a pcb that measures 2 x 2 inches. so have a go, it is fun and easy. both nor, gm3rko and iain gm4hbg have built one and has already improved the receiver by placing a small rf choke between the base of the pa and supply rail. so have a go, there is no reason why the pa/detector idea cannot be used with a vfo transmitter and a better audio side.





foxx型的mini收发机

george burt，呼号为gm30xx
[在一个2 x 2英寸的pcb上的收发机]

  在n.e.c.举行的r.s.g.b. hf大会上，和俱乐部里的人聊天后，我得知会员们明显地需要一个简单的无线电收发机，它应当便宜且易得，就像md108s那样。第一步就是做一个非常简单的发射机，然后再把它扩展为一个收发机。

  stx不幸被做成了几个单独的接收机部件。在开会期间，着眼于stx电路，使用pa作为检波器的主意形成了。为什么不呢？毕竟这只有两个二极管。因此pcb被削减了，一个47k欧姆的电阻被连接到了连同音频放大器一起的发射极上。它工作良好，下一步就是连接拨动开关。由于它遍布在bench上，和一个rf线圈的速制的mini z匹配，在有负载时，在40米波段就会有2.5瓦的rf输出。若使用r*，就会降低到1瓦。尝试去掉电路中的一些r*，否则，bc108就不能正常工作。

  在一次快速的cq呼叫后，返回了la6，其后有frank，呼号为on5ag和呼号为的g4gxi的peter，他们都是俱乐部成员。一个5k欧姆的电位器被连接到接收机端，以便为为pa/检波器调节振荡器轨道。结论是：在晶体停止振动之前，它改变了驱动器，仍然很好地改变了频率。在40米波段，使用最大值的连续晶体电容，在晶体停止振动之前，就会拉高晶体1.5khz，现在我们把irt也走好了，在20米波段，拉高了3khz，在80米波段，仅仅只拉高了400hz，你仍然不能赢得全部的'em！

  另外一个好处是在发射时发现的。当没有检波器的重击声与声音留下，一个平滑的滴答侧音产生了。仍然可能接收到零拍，击键就会短接irt控制器，这样就可以调谐晶体电容。

  现在，你还需要更多的什么呢？一个简单的收发机，它带有天然的irt与侧音，被布在一个2 x 2英寸的pcb上。因此，赶快行动，它即有趣又简单。呼号为gm3rko与iain，呼号为gm4hbg也做了一台，并改良了接收机，通过放置一个小的rf扼流圈，在pa的基极与电源之间。因此，赶快行动，没有理由pa/检波器的主意不能被用到一个vfo发射机上，且拥有一个更好的音频端。

刚刚画好电路图，附带在后面。由于是扫描的图看不清晰，欢迎指正！

俺也想学习翻译技术资料了，尝试楼主贴出的这段，希望得到朋友们的指教！

now what more could you want? a simple transceiver with crude irt and side-tone with a pcb that measures 2 x 2 inches. so have a go, it is fun and easy. both nor, gm3rko and iain gm4hbg have built one and has already improved the receiver by placing a small rf choke between the base of the pa and supply rail. so have a go, there is no reason why the pa/detector idea cannot be used with a vfo transmitter and a better audio side.

您还等什么？一台带有简单接收差频（ＩＲＴ）和侧音电路，只有２英寸见方大小的简易收发报机！它是那么简易而有趣，赶快行动吧！gm3rko和gm4hbg 都各做一台了，并且已经在末级功放管的基极与发射极之间增加一个高频扼流圈，改良接收部分。心动不如行动！没有理由不把功放／解调两用的作法，应用到频率可调的发报机和产生更好的音调电路中去！

我删................

ba5rw，谢谢你的指教。我承认，我的en文和语文都不行，可是为什么是我这么差劲的人在翻译呢？？欢迎加入志愿翻译自己感兴趣、别人有用的文档的队伍中来。

  bigman，同意翻译《super j天线》。每千en文字母50￥。如果同意就成交，否则就请自行删除你的回帖，谢谢！

  人不可无耻！！

'

ba5rw，谢谢你的指教。我承认，我的en文和语文都不行，可是为什么是我这么差劲的人在翻译呢？？欢迎加入志愿翻译自己感兴趣、别人有用的文档的队伍中来。
  bigman，同意翻译《super j天线》。每千en文字母50￥。如果同意就成交，否则就请自行删除你的回帖，谢谢！
  人不可无耻！！

'

没明白楼主的意思．．．你不是志愿翻译者吗？．．为什么提money??　翻译出来可以转贴在.net的．我人笨，不明白了．．．

'

ba5rw，谢谢你的指教。我承认，我的en文和语文都不行，可是为什么是我这么差劲的人在翻译呢？？欢迎加入志愿翻译自己感兴趣、别人有用的文档的队伍中

'
我晕，我再晕！
我真的在尝试我的翻译方法，效率极低，不是在您面前卖弄，卖弄也没有意义！真的是想征求包括您在内的朋友们的意见．我的英文中学水平都达不到，但我希望通过这种尝试提高自己的阅读能力和意译水平！

第04页

广告信息，不予翻译。



第05页


the micro-80                  mini-transceiver
oleg borodin rv3gm            p.o.box 229,lipetsk 43,u.s.s.r

oleg offers members the circuit of his miniature micro-80 transceiver which is produced in kit form by his small company radio-s. the circuit is a simple qsk transceiver for 80 metres which could be adapted for other bands by changing crystals and l and c in q4. the devices quoted are russian types but any generic transistor should perform in the circuit. q1-3 would probably work with bc108 and perhaps a 2n3866 for q4. the rf choke is around 100uh and could be home-wound with 180 turns of 0.1mm wire on a 1/4 watt resistor of high value : say over 400k. l is wound with 18 turns [5+13] of 0.33mm wire on an 8mm former with ferrite core. oleg’s suggested layout is used a pcb 50 x 35mm. he says, ‘is this the world’s smallest transceiver?’

the hb9adq mutliband delta loop : a plea from w5qjm.

main reference. simple low cost wire antennas. orr. 1990 edn. p.60

several variations of this antenna [all claiming to original] have appeared in abbreviated form in us magazines, none has been complete. in fact the more articles that have run, the less and less is said about the antenna and how it works! no one has cited the source of this design or otherwise offered an explanation of more than is seen in the orr ref. while there is general agreement about the dimensions of the loop proper, there are variations in feeder length and methods of feeding. it occurs to me this would be a good design for qrpers with limited space. i would like to try it too, but have neither the inclination to re-invent the wheel by duplicating hb9adq’s work to arrive at the same point as he did.

can anyone help?

fred bonavita, w5qjm, box 2764, san antonio, texas 78299-2764,usa





the micro-80                  mini-transceiver
oleg borodin rv3gm            p.o.box 229,lipetsk 43,u.s.s.r

  oleg通过他的小公司radio-s，给会员以套件形式提供他的缩微的micro-80收发机的电路板。该电路是一个工作在80米波段的简单的qsk收发机，通过替换晶体与q4处的l/c，也可以工作在其它波段。本电路引用自俄罗斯的类型，但是普通的晶体管也能够在本电路里正常工作。q1-3可用bc108替换，q4处可能就需要2n3866了。对于大约100uh的rf扼流圈，通过使用0.1mm的线在1/4瓦的高值电阻，如400k欧姆上绕180圈即可得到，l通过使用0.33mm的线在一个8mm样板的铁氧体磁芯上绕18圈即可。oleg建议设计50 x 35mm的pcb。他说：“这难道不是世界上最小的收发机吗？”

hb9adq做的多波段的delta线圈：来自w5qjm的辩解

主要参考：《简单便宜的天线》。orr，《edn》，1990年，p.60。

这种天线的几个变形（都声称为原创）以缩写的形式发表在us的杂志上，但是都没有完全版。事实上，发表的文章中绝少提到天线及其工作原理！也无人引证本设计的原始资料，或者提供另外一个比引用自orr的文档更多的的解释。虽然对于正确的环的尺寸有一致的看法，但是有很多种馈线长度与馈线方法。在我看来，对于只有有限空间的qrpers来说，这将是个好的设计。我也喜欢尝试，但是，没有重新发明轮子的爱好，即通过重复hb9adq的工作来达到他所达到的同样的目标。

有谁可以来帮忙的？

fred bonavita, w5qjm, box 2764, san antonio, texas 78299-2764,usa

皮鞋机是很精确的收发同频吗

第06页 图在以后附上。（已经画好了！）

the pixie 2 : an update by wa6boy
reproduced from qrpp june 1995(northern california qrp club)


第07页



the pixie goes on…… more on a popular idea
derrick webber g3lhj, 43 lime tree walk. milber, newton abbott. tq12 4lf

historical note: sprat 72 (autumn 1992) contained a very simple transceiver circuit, the micro-80 by oleg borodin, rv3gm. the idea has undergone several incarnations. one of the latest being the vu-qrp club mini-transmitter in this issue. the pixie 2 a californian version of the circuit.

i built my pixie after hearing george g3ico and the twp pixies met and were compared at the yeovil qrp convention. i have been having good fun with it. when i first put it on the air there was a problem in that everyone was coming back to me nearly zero beat. this made copy difficult some i made some modifications.

i lifted the ground end of the crystal and with a stdp switch on the front panel (marked [t]ransmit and [r]eceive) selecting two capacitors, 1000pf and 40pf. this gave me my 600hz offset and all was well. see the drawing. i use an internal pp3 battery but backed this up with an outboard power socket.

the g3lhj version of w6boy’s pixie 2 from qrpp of june 1995

i could not find a mustard tin for mine so i made a home for the pixie. it is a simple base plate with bent up front and back panels. the size is 3’ x (5/4)’ x (7/2)’ deep. total qsos to date is 18 and the best dx is g3jnb in norwich.








pixie的发展……超越一个普通的想法

derrick webber g3lhj, 43 lime tree walk. milber, newton abbott. tq12 4lf

  历史注解：《sprat》 72（1992年秋季）刊登了一个非常简单的收发机电路，由oleg borodin，呼号为rv3gm所设计的micro-80。这个设计已经经历了几种演变。本刊给出的最新版本是由vu-qrp俱乐部设计的mini收发机。pixie 2是一个californian的电路版本。

  在听取了george，呼号为g3ico的意见、参加了笨pixies的聚会并在yeovil qrp大会上进行比较之后，我完成了我的pixie。我对它怀有浓厚的兴趣。当我第一次让它工作后，发生了一个问题，我回忆每个人几乎为零拍。这使得我在做的过程中发生了一些困难，且做了一些修改。

  我通过一个stdp开关在晶体的末端拉高地，那个在前面板上开关（标记为[t]发射与[r]接受）可以选择两个电容：1000pf与40pf。这给了我，我的600hz的偏移，且全部工作良好。如图所示，我使用了一个内置的pp3电池，但是在背面也有一个外接电源插孔。

由w6boy设计、g3lhj制作的pixie 2，发表在1995年6月的《qrpp》。

  我没有为pixie找到芥末罐，因此我为它做了一个家。这是一个有前板和背板的简单的底座。尺寸为3 x (5/4) x (7/2)英寸。到此为止，全部的qsos为18，最好的dx是和在norwich的g3jnb通连时取得的。

第08页



my version of the pixie with transmit offset & af filter
doug demaw, w1fb, po box 250, luther, mi 49656.usa

my version of the pixie transceiver (see sprat 88 for the g3lhj version) is shown below. it includes 700hz offset on transmit and a single af filter stage at 700hz.

a simple vlf converter
stan walker, g3mpw, 14 st. john’s dve. scawby, brigg. s. humberside

i built this converter about 30 years ago from an american publication. it is a mixer/oscillator. the incoming vlf signals mix with the oscillator frequency and are tuned on the station receiver.

in my case i use a 3mhz crystal and 73khz would be tuned on 3.073mhz(3.00mhz + 73khz) and 2.927mhz. the converter can be easily checked by listening for bbc radio four(198khz) which can be tuned on 3.198 or 2.802mhz. other crystal frequencies can be used provided the output frequency can be tuned on the receiver and there are no strong adjacent signals.

radio projects for the amateur

by drew diamond, vk3xu (reprinted, with permission, by the g-qrp club)

workable plans for the construction of receivers, qrp transmitters, transceivers, test equipment, and some handy construction hints for the practical radio amateur.

availabel for ￡6.00 (plus uk postage ￡1, eec postage ￡1.75) from :
ian wye g0oky, new house, hook road, amcotts, nr. scunthorpe, dn17 4az
please make out all cheques to “g-qrp club” (an address sticker helps)



我做的带有发射偏移与af滤波器的pixie

doug demaw, w1fb, po box 250, luther, mi 49656.usa

  我做的pixie收发机（参见《sprat》第88期，g3lhj的设计）如下图所示。它包括700hz的发射偏移与在700hz的一个单独的af滤波器级。

一个简单的vlf转换器

stan walker, g3mpw, 14 st. john’s dve. scawby, brigg. s. humberside

  在大约30年前，我参考了一个美国的出版物后做了这个转换器。它是一个混频器/振荡器。输入vlf信号混合了振荡器频率后被调谐成电台接收机。

  我使用了3mhz的晶体，因此73khz将被调谐到3.073mhz（3.00mhz + 73khz）与2.927mhz（3.00mhz - 73khz）。我可以通过收听bbc4台（198khz）来非常方便地检查转换器，它能够被调谐到3.198mhz或者2.802mhz。其它频率的晶体能被用来提供调谐接收机的输出频率，在没有强的临近信号时。

适合业余无线电爱好者的项目

by drew diamond, vk3xu (reprinted, with permission, by the g-qrp club)

workable plans for the construction of receivers, qrp transmitters, transceivers, test equipment, and some handy construction hints for the practical radio amateur.

availabel for ￡6.00 (plus uk postage ￡1, eec postage ￡1.75) from :
ian wye g0oky, new house, hook road, amcotts, nr. scunthorpe, dn17 4az
please make out all cheques to “g-qrp club” (an address sticker helps)

第09页


the .a.lva - a swedish pixie
johnny apell, sm7ucz, ekedalsvagen 11, s 373 00 jamjo, sweden

a swedish version of the popular pixie transceiver complete with printed circuit layout. pcb mounted connectors are used throughout : photo for antenna and key, 3.5mm jack for audio out, pcb angled terminal blocks - 2 way for power, 3 way for crystal.

[g3rjv] johnny gave me a prototype - a very nice layout ... and it works.



the .a.lva - 来自瑞典的pixie
johnny apell, sm7ucz, ekedalsvagen 11, s 373 00 jamjo, sweden

  在瑞典流行的pixie收发机是使用印刷电路设计完成的。pcb上预留了如下通孔：天线与按键的photo、音频输出的3.5mm插孔和pcb直角端子——2路电源与3路晶体。

[g3rjv] johnny给了我一个原型 ——一个非常好的设计……且它能够工作。


pcb版图和元器件布局图省略。

第10页

（画图还是很花时间的。一个多小时！protel 99画，然后用gimp截图。争取不用d版。以前用acd see干的。photoshop还不会。正版本，现在还不至于去买！）

第11页


the foxx 2 - an old favourite revisited
g3rjv after george burt gm3oxx

in recent times a lot has been written about the simple pixie transceiver based upon the micro-80 of rv3gm. both use the transmit pa transistor as the mixer on receive. but this was not a new idea. in the summer 1983 issue of sprat, that master of the simple radio circuit, george burt, gm3oxx, described his foxx transceiver. an elegant little circuit which used the same transistor for the transmit power amplifier and the receive mixer. it is capable of transceiver operation on several bands and generates around one watt of rf power out. to keep the simple transceiver ideas flowing, i thought it a good idea to revise the foxx circuit with a few changes.

tr1 is a vxo (variable crystal oscillator) stage. the feedback loop formed by the crystal and the trimmer capacitor (c1) tunes the circuit to the desired frequency. c1 provides a small amount of frequency shift. the output is coupled to a power amplifier stage. this stage is unusual in that a pnp transistor is used with the emitter connected to the positive supply and the output taken from the collector load which goes to ground. the output of the transmitter may be adjusted by a resistor (rx - a few hundred ohms) to around one watt of output power. tr2 should be fitted with a clip-on heatsink. tr3, another pnp transistor allows the transmitter to be keyed with respect to ground. tr3 and tr2 are both 2n2905a pnp switching transistors.

the low pass filter is a seven element circuit based on the circuit and constants described by w3nqn. the transmit - receive function is performed by a double-pole, double throw switch, sw1 a and b. the receive position has two functions. it bypasses the keying transistor, tr3, to ensure that the oscillator tr1 remains on during the receive position to provide the local oscillator. it also switches the supply line away from the power amplifier, tr3, and connects tr3 to the audio amplifier. in this position tr3 functions as a diode mixer, mixing the signals from the antenna which appear at the emitter and the signal from tr1.

the audio amplifier is an lm386 working in maximum gain mode. the supply for the lm386 is taken directly from the 12 volt supply line which means it is on during both transmit and receive functions. this has the advantage of providing a rudimentary sidetone to monitor the keying. side "tone" is an over statement because all it does is produce clicks in time with the keying.

a pre-set potentiometer is added in series with the tr1 supply on receive. this is a very simple form of rit (receive incremental tuning). if the supply voltage to tr1 is reduce enough, it shifts the frequency of the oscillations. assuming the value of rx to be in the order of a few hundred ohms (just to reduce the drive from tr1 a little on transmit), a 1k preset at r6 can be set to shift the frequency by around 700-800 hz giving a comfortable off-set for cw reception.

values for low pass filter for four bands

note : wire gauge is not critical.
use size to comfortably fill the core about three-quarters of full circumference.

kits for the foxx 2 at a special club price
kanga products are offering 100 foxx 2 kits
to members only - at only ￡10 each plus ￡1.50 pp







the foxx 2 - 故地重游
g3rjv after george burt gm3oxx

  近来，很多文章谈及简单的pixie收发机，它基于由rv3gm设计的micro-80。发射机的pa晶体管也被用作接收机的混频器。但是这不是一个新主意了。在1983年的夏季的《sprat》里，这个简单的电路的主要部分，由呼号为gm3oxx的george burt在他的foxx收发机里描述过。这是一个优雅的小电路，它使用了同样的晶体管作为发射机pa部分和接收机混频器部分。收发机能够工作在几个波段上，并产生大约一瓦的rf功率输出。为了使这个简单的收发机看起来更加顺畅，我认为对foxx电路做一些小修正是一个好主意。

  tr1是一个vxo（可变晶体振荡器）级。这个反馈回路由晶体与微调电容(c1)组成，使用微调电容以调整电路到设计频率。c1提供了少量的频率偏移。输出被耦合到pa级。本级不寻常的是使用了一个pnp晶体管，它的发射极被连接到电源正极，集电极负载的输出回到地了。发射机的输出由一个电阻（rx——几百欧姆）来调节到大约一瓦的输出功率。tr2需要接散热片。另外一个pnp晶体管tr3可使发射机短接到地。tr3与tr2都使用的是开关晶体管2n2905a。

  低通滤波器是由7个元件组成的电路，它基于由w3nqn所描述的电路与常数。发射-接收功能由一个双刀双掷开关：sw1 a与b来实现。接收处有2个功能。它可旁路键控晶体管tr3，来确保tr1振荡器在接收时仍然在工作，以提供本机振荡器。它也可使电源线远离pa：tr3，并连接tr3到音频放大器。在这里，tr3起到了一个二极管混频器的作用，它混合加在发射极的天线信号与tr1的信号。

  音频放大器使用了一个lm386，它工作在最大增益模式。它右12v电源直接供电，那就意味着，在发射与接收时它都在工作。这样做的好处是，提供了一个初步的侧音来监视按键。侧音是结束的标志，因为它会在按键时及时产生“滴答”声。

  在接收机里，一个电位器被串在tr1的供电部分。这是rit（接收增量调谐）的一个非常简单的形式。假如tr1的电压足够小的话，它就会改变振荡频率。假设rx为几百欧姆（仅仅为了在发射机部分，减少一点儿tr1的驱动能力），在r6处的1k电位器，能够改变频率大约700-800hz，以为cw接收产生一个适合的偏移。

4波段的低通滤波器的值

band      c1,7      c3,5      l2,6      l4      core      wire
mhz      pf      pf      truns      turns            swg

3.5      470      1200      25      27      t37-2      28
7.0      270      680      19      21      t37-6      26
10.1      270      560      19      20      t37-6      26
14.0      180      390      16      17      t37-6      24

注意：线规的要求并不严格！
使用能够完美地填充全部核心的大约3/4的尺寸即可。

（广告不予翻译）
kits for the foxx 2 at a special club price
kanga products are offering 100 foxx 2 kits
to members only - at only ￡10 each plus ￡1.50 pp

第12页

（画个图还是很花时间的，也许是因为不熟悉，2个小时过去了！）

（没有想到这一页也花了一个多小时！）

第13页

a different solution is as follows. see fig. (3) :

a tuned circuit was used instead of the single choke. the transformer is made up from a ft 37-61 toroid core. the primary winding with parallel caps is connected between pin 1 - icc 2 as described above. desolder c28 from pin 1 - ic2 and pull upwards, secondary winding is soldered between ground and the tree end of c28, adjust the trimmer to the if of 4.4336 mhz. the last mod is a bit tricky, because all part must be soldered on the component slide of the pcb and as near to ic2 as possible. weak signal reception is now much better.

t = ft37-61. pri. 15t 34swg, sec. 7t 34swg. cp : 100pf npo, ctr : 35 pf adjust for max. rx sigs.

more mileage from the pixie
george davis, g3ico, broadview, east lanes, mudford, yeovil, ba21 5sp

just in case your thought the maximum mileage had been extracted from the pixie, i have now been using it with vxo. using a ceramic resonator, 3.580khz, and a 60pf variable capacitor, i can cover from about 3550 to 3585. to date i have had 31 qsos with the pixie 2, including one 2 way pixie qso with g3lhj, one "f", one "gm", one "gw" and one "ei". i have even had some mini pixie photos produced for sticking on qsl cards for pixie qsos!

radio projects for the amateur

by drew diamond, vk3xu (reprinted, with permission, by the g qrp club)
workable plans for the construction of receivers, qrp transmitters, transceivers, test
equipment, and some handy construction hints for the practical radio amateur.
available for ￡6.00 (plus uk postage ￡1, eec postage ￡1.75) from :
lan wye g0oky, new house, hook road, amcotts, nr. scunthorpe, dn17 4az
please make out all cheques to "g qrp club" (an address sticker helps)

members requests:

help wanted: rod wilson, g4bfp, is wheelchair bound and almost blind. his friend don, g4ysu is trying to find suitable hf [phone] equipment to enable rod to operate from a ground floor flat. if anyone can offer help or advice, please contact : don hodkinsob, g4ysu, ferndale, liverpool road, much hoole, preston, pr4 4rj.

stolen items : stolen with two duplicate keys from a private apartment in germany, these items of a radio collector: transistor radios [1960-70] 3 schaub-lorenz t 20, t 40, t 50 / 2 russian vf 601, 1 saba. greman(german????) and english vintage wireless literature - each item engraved "wb", "w. brox", "oberursel". each radio requires restoration. reward for return of property and proof about producers of duplicate keys. mr. w. brox, po box 110302, 60038 frankfurt/m, west germany.








图3是个不同的方案：

  我用一个调谐电路替换了那个单独的扼流圈（rfc）。变压器使用了一个ft 37-61环形磁芯。初级的并联电容被连接到了上述的脚1与icc 2上。拆掉脚1与ic2之间的c28将会变成上拉，次级被焊接到c28的末端与地之间，这样就可以调整4.4336 mhz的if的微调器。最后的mod是有一点tricky，因为焊接到pcb上的所有元件都必须尽可能靠近ic2。现在就可以更好地接收弱信号了。

t = ft37-61. pri. 15t 34swg, sec. 7t 34swg. cp : 100pf npo, ctr : 35 pf adjust for max. rx sigs.

more mileage from the pixie
george davis, g3ico, broadview, east lanes, mudford, yeovil, ba21 5sp

  也许你想知道pixie所取得的最好的成绩，我现在增加了vxo。使用了一个3.580khz的陶瓷谐振器和一个60pf的可变电容，我就能够涵盖3550到3585的频率范围了。迄今为止，我使用pixie 2取得了31个qsos，包括一个和g3lhj进行双向通连所取得的pixie qso、一个“f”、一个“gm”、一个“gw”与一个“ei”。通过pixie qsos通连，我甚至获得了一些贴在qsl卡上的mini pixie的照片！

（广告不予翻译：）
radio projects for the amateur

by drew diamond, vk3xu (reprinted, with permission, by the g qrp club)
workable plans for the construction of receivers, qrp transmitters, transceivers, test
equipment, and some handy construction hints for the practical radio amateur.
available for ￡6.00 (plus uk postage ￡1, eec postage ￡1.75) from :
lan wye g0oky, new house, hook road, amcotts, nr. scunthorpe, dn17 4az
please make out all cheques to "g qrp club" (an address sticker helps)

会员问题：（轮椅+视力问题/失窃）

help wanted: rod wilson, g4bfp, is wheelchair bound and almost blind. his friend don, g4ysu is trying to find suitable hf [phone] equipment to enable rod to operate from a ground floor flat. if anyone can offer help or advice, please contact : don hodkinsob, g4ysu, ferndale, liverpool road, much hoole, preston, pr4 4rj.

stolen items : stolen with two duplicate keys from a private apartment in germany, these items of a radio collector: transistor radios [1960-70] 3 schaub-lorenz t 20, t 40, t 50 / 2 russian vf 601, 1 saba. greman(german????) and english vintage wireless literature - each item engraved "wb", "w. brox", "oberursel". each radio requires restoration. reward for return of property and proof about producers of duplicate keys. mr. w. brox, po box 110302, 60038 frankfurt/m, west germany.